77132481 has 8 divisors (see below), whose sum is σ = 104082720. Its totient is φ = 50801952.

The previous prime is 77132479. The next prime is 77132491. The reversal of 77132481 is 18423177.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77132481 - 2¹ = 77132479 is a prime.

It is a super-2 number, since 2×77132481² = 11898839250430722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77132491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154636 + ... + 155133.

It is an arithmetic number, because the mean of its divisors is an integer number (13010340).

Almost surely, 2^77132481 is an apocalyptic number.

It is an amenable number.

77132481 is a deficient number, since it is larger than the sum of its proper divisors (26950239).

77132481 is a wasteful number, since it uses less digits than its factorization.

77132481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309855.

The product of its digits is 9408, while the sum is 33.

The square root of 77132481 is about 8782.5099487561. The cubic root of 77132481 is about 425.6759366201.

The spelling of 77132481 in words is "seventy-seven million, one hundred thirty-two thousand, four hundred eighty-one".