77641745234 has 4 divisors (see below), whose sum is σ = 116462617854. Its totient is φ = 38820872616.

The previous prime is 77641745221. The next prime is 77641745261. The reversal of 77641745234 is 43254714677.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76453909009 + 1187836225 = 276503^2 + 34465^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19410436307 + ... + 19410436310.

Almost surely, 2^77641745234 is an apocalyptic number.

77641745234 is a deficient number, since it is larger than the sum of its proper divisors (38820872620).

77641745234 is a wasteful number, since it uses less digits than its factorization.

77641745234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38820872619.

The product of its digits is 3951360, while the sum is 50.

The spelling of 77641745234 in words is "seventy-seven billion, six hundred forty-one million, seven hundred forty-five thousand, two hundred thirty-four".