73656976778 has 32 divisors (see below), whose sum is σ = 138401008128. Its totient is φ = 28561503600.

The previous prime is 73656976741. The next prime is 73656976801. The reversal of 73656976778 is 87767965637.

It is a super-2 number, since 2×73656976778² (a number of 23 digits) contains 22 as substring.

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, 1100900 + ... + 1165887.

It is an arithmetic number, because the mean of its divisors is an integer number (4325031504).

Almost surely, 2^73656976778 is an apocalyptic number.

73656976778 is a deficient number, since it is larger than the sum of its proper divisors (64744031350).

73656976778 is a wasteful number, since it uses less digits than its factorization.

73656976778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267018.

The product of its digits is 560105280, while the sum is 71.

The spelling of 73656976778 in words is "seventy-three billion, six hundred fifty-six million, nine hundred seventy-six thousand, seven hundred seventy-eight".