77474309384 has 8 divisors (see below), whose sum is σ = 145264330110. Its totient is φ = 38737154688.

The previous prime is 77474309377. The next prime is 77474309411. The reversal of 77474309384 is 48390347477.

It can be written as a sum of positive squares in only one way, i.e., 58230516100 + 19243793284 = 241310^2 + 138722^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×77474309384² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4842144329 + ... + 4842144344.

Almost surely, 2^77474309384 is an apocalyptic number.

It is an amenable number.

77474309384 is a deficient number, since it is larger than the sum of its proper divisors (67790020726).

77474309384 is a wasteful number, since it uses less digits than its factorization.

77474309384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684288679 (or 9684288675 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 56.

The spelling of 77474309384 in words is "seventy-seven billion, four hundred seventy-four million, three hundred nine thousand, three hundred eighty-four".