77671107044072 has 16 divisors (see below), whose sum is σ = 145633845105060. Its totient is φ = 38835415016064.

The previous prime is 77671107044059. The next prime is 77671107044081. The reversal of 77671107044072 is 27044070117677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66990198040516 + 10680909003556 = 8184754^2 + 3268166^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14910323 + ... + 19433474.

Almost surely, 2^{77671107044072} is an apocalyptic number.

It is an amenable number.

77671107044072 is a deficient number, since it is larger than the sum of its proper divisors (67962738060988).

77671107044072 is a wasteful number, since it uses less digits than its factorization.

77671107044072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34626500 (or 34626496 counting only the distinct ones).

The product of its (nonzero) digits is 3226944, while the sum is 53.

The spelling of 77671107044072 in words is "seventy-seven trillion, six hundred seventy-one billion, one hundred seven million, forty-four thousand, seventy-two".