77274172756 has 48 divisors (see below), whose sum is σ = 155323465920. Its totient is φ = 33268320000.

The previous prime is 77274172747. The next prime is 77274172783. The reversal of 77274172756 is 65727147277.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77274172697 and 77274172706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5109606 + ... + 5124706.

It is an arithmetic number, because the mean of its divisors is an integer number (3235905540).

Almost surely, 2^77274172756 is an apocalyptic number.

77274172756 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

77274172756 is an abundant number, since it is smaller than the sum of its proper divisors (78049293164).

77274172756 is a wasteful number, since it uses less digits than its factorization.

77274172756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21256 (or 21254 counting only the distinct ones).

The product of its digits is 8067360, while the sum is 55.

The spelling of 77274172756 in words is "seventy-seven billion, two hundred seventy-four million, one hundred seventy-two thousand, seven hundred fifty-six".