73778461 has 4 divisors (see below), whose sum is σ = 73829500. Its totient is φ = 73727424.

The previous prime is 73778447. The next prime is 73778479. The reversal of 73778461 is 16487737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39614436 + 34164025 = 6294^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 73778461 - 2¹⁷ = 73647389 is a prime.

It is a super-2 number, since 2×73778461² = 10886522615057042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73778431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23286 + ... + 26263.

It is an arithmetic number, because the mean of its divisors is an integer number (18457375).

Almost surely, 2^73778461 is an apocalyptic number.

It is an amenable number.

73778461 is a deficient number, since it is larger than the sum of its proper divisors (51039).

73778461 is a wasteful number, since it uses less digits than its factorization.

73778461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51038.

The product of its digits is 197568, while the sum is 43.

The square root of 73778461 is about 8589.4389223045. The cubic root of 73778461 is about 419.4142647636.

The spelling of 73778461 in words is "seventy-three million, seven hundred seventy-eight thousand, four hundred sixty-one".