77136451 has 4 divisors (see below), whose sum is σ = 88155952. Its totient is φ = 66116952.

The previous prime is 77136443. The next prime is 77136487. The reversal of 77136451 is 15463177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15463177 = 29 ⋅533213.

It is a cyclic number.

It is not a de Polignac number, because 77136451 - 2³ = 77136443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77136421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5509740 + ... + 5509753.

It is an arithmetic number, because the mean of its divisors is an integer number (22038988).

Almost surely, 2^77136451 is an apocalyptic number.

77136451 is a deficient number, since it is larger than the sum of its proper divisors (11019501).

77136451 is a wasteful number, since it uses less digits than its factorization.

77136451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019500.

The product of its digits is 17640, while the sum is 34.

The square root of 77136451 is about 8782.7359632406. The cubic root of 77136451 is about 425.6832396588.

The spelling of 77136451 in words is "seventy-seven million, one hundred thirty-six thousand, four hundred fifty-one".