77768037217746 has 24 divisors (see below), whose sum is σ = 168497697015180. Its totient is φ = 25922635527456.

The previous prime is 77768037217693. The next prime is 77768037217853. The reversal of 77768037217746 is 64771273086777.

77768037217746 is a `hidden beast` number, since 7 + 7 + 7 + 6 + 80 + 372 + 177 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69567459985521 + 8200577232225 = 8340711^2 + 2863665^2 .

It is a super-2 number, since 2×77768037217746² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8475660 + ... + 15078888.

Almost surely, 2^{77768037217746} is an apocalyptic number.

77768037217746 is an abundant number, since it is smaller than the sum of its proper divisors (90729659797434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77768037217746 is a wasteful number, since it uses less digits than its factorization.

77768037217746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257530 (or 7257527 counting only the distinct ones).

The product of its (nonzero) digits is 813189888, while the sum is 72.

The spelling of 77768037217746 in words is "seventy-seven trillion, seven hundred sixty-eight billion, thirty-seven million, two hundred seventeen thousand, seven hundred forty-six".