77908015472 has 40 divisors (see below), whose sum is σ = 172961120256. Its totient is φ = 33301953216.

The previous prime is 77908015433. The next prime is 77908015477. The reversal of 77908015472 is 27451080977.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77908015472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77908015477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865208 + ... + 950999.

Almost surely, 2^77908015472 is an apocalyptic number.

It is an amenable number.

77908015472 is an abundant number, since it is smaller than the sum of its proper divisors (95053104784).

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

77908015472 is a wasteful number, since it uses less digits than its factorization.

77908015472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816605 (or 1816599 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 77908015472 in words is "seventy-seven billion, nine hundred eight million, fifteen thousand, four hundred seventy-two".