77404618472 has 64 divisors (see below), whose sum is σ = 156152275200. Its totient is φ = 35855447040.

The previous prime is 77404618427. The next prime is 77404618477. The reversal of 77404618472 is 27481640477.

It is a super-2 number, since 2×77404618472² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77404618472.

It is not an unprimeable number, because it can be changed into a prime (77404618477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10233572 + ... + 10241132.

It is an arithmetic number, because the mean of its divisors is an integer number (2439879300).

Almost surely, 2^77404618472 is an apocalyptic number.

It is an amenable number.

77404618472 is an abundant number, since it is smaller than the sum of its proper divisors (78747656728).

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

77404618472 is a wasteful number, since it uses less digits than its factorization.

77404618472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9066 (or 9062 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 50.

The spelling of 77404618472 in words is "seventy-seven billion, four hundred four million, six hundred eighteen thousand, four hundred seventy-two".