77257460827 has 4 divisors (see below), whose sum is σ = 77328535936. Its totient is φ = 77186385720.

The previous prime is 77257460807. The next prime is 77257460879. The reversal of 77257460827 is 72806475277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72806475277 = 29 ⋅2510568113.

It is a cyclic number.

It is not a de Polignac number, because 77257460827 - 2³⁵ = 42897722459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77257460807) 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, 35535924 + ... + 35538097.

It is an arithmetic number, because the mean of its divisors is an integer number (19332133984).

Almost surely, 2^77257460827 is an apocalyptic number.

77257460827 is a deficient number, since it is larger than the sum of its proper divisors (71075109).

77257460827 is a wasteful number, since it uses less digits than its factorization.

77257460827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71075108.

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 77257460827 in words is "seventy-seven billion, two hundred fifty-seven million, four hundred sixty thousand, eight hundred twenty-seven".