77474309386 has 4 divisors (see below), whose sum is σ = 116211464082. Its totient is φ = 38737154692.

The previous prime is 77474309377. The next prime is 77474309411. The reversal of 77474309386 is 68390347477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68390347477 = 7121 ⋅9604037.

It can be written as a sum of positive squares in only one way, i.e., 64219162225 + 13255147161 = 253415^2 + 115131^2 .

It is a super-2 number, since 2×77474309386² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 77474309386.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19368577345 + ... + 19368577348.

Almost surely, 2^77474309386 is an apocalyptic number.

77474309386 is a deficient number, since it is larger than the sum of its proper divisors (38737154696).

77474309386 is a wasteful number, since it uses less digits than its factorization.

77474309386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38737154695.

The product of its (nonzero) digits is 21337344, while the sum is 58.

The spelling of 77474309386 in words is "seventy-seven billion, four hundred seventy-four million, three hundred nine thousand, three hundred eighty-six".