77356356249 has 32 divisors (see below), whose sum is σ = 116531671680. Its totient is φ = 45352783872.

The previous prime is 77356356241. The next prime is 77356356281. The reversal of 77356356249 is 94265365377.

It is not a de Polignac number, because 77356356249 - 2³ = 77356356241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (77356356241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 476052 + ... + 617525.

It is an arithmetic number, because the mean of its divisors is an integer number (3641614740).

Almost surely, 2^77356356249 is an apocalyptic number.

It is an amenable number.

77356356249 is a deficient number, since it is larger than the sum of its proper divisors (39175315431).

77356356249 is a wasteful number, since it uses less digits than its factorization.

77356356249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093689.

The product of its digits is 28576800, while the sum is 57.

The spelling of 77356356249 in words is "seventy-seven billion, three hundred fifty-six million, three hundred fifty-six thousand, two hundred forty-nine".