77057449497 has 80 divisors (see below), whose sum is σ = 133988840832. Its totient is φ = 43221185280.

The previous prime is 77057449489. The next prime is 77057449531. The reversal of 77057449497 is 79494475077.

77057449497 is a `hidden beast` number, since 7 + 7 + 0 + 57 + 4 + 494 + 97 = 666.

It is not a de Polignac number, because 77057449497 - 2³ = 77057449489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (77057449457) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18917053 + ... + 18921125.

Almost surely, 2^77057449497 is an apocalyptic number.

It is an amenable number.

77057449497 is a deficient number, since it is larger than the sum of its proper divisors (56931391335).

77057449497 is a wasteful number, since it uses less digits than its factorization.

77057449497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700 (or 4691 counting only the distinct ones).

The product of its (nonzero) digits is 62233920, while the sum is 63.

The spelling of 77057449497 in words is "seventy-seven billion, fifty-seven million, four hundred forty-nine thousand, four hundred ninety-seven".