77474309385 has 32 divisors (see below), whose sum is σ = 135662791680. Its totient is φ = 37442494400.

The previous prime is 77474309377. The next prime is 77474309411. The reversal of 77474309385 is 58390347477.

It is a happy number.

It is not a de Polignac number, because 77474309385 - 2³ = 77474309377 is a prime.

It is a super-2 number, since 2×77474309385² (a number of 23 digits) contains 22 as substring.

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 in 31 ways as a sum of consecutive naturals, for example, 703575 + ... + 806204.

It is an arithmetic number, because the mean of its divisors is an integer number (4239462240).

Almost surely, 2^77474309385 is an apocalyptic number.

It is an amenable number.

77474309385 is a deficient number, since it is larger than the sum of its proper divisors (58188482295).

77474309385 is a wasteful number, since it uses less digits than its factorization.

77474309385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510109.

The product of its (nonzero) digits is 17781120, while the sum is 57.

The spelling of 77474309385 in words is "seventy-seven billion, four hundred seventy-four million, three hundred nine thousand, three hundred eighty-five".