77839964102 has 8 divisors (see below), whose sum is σ = 116763190536. Its totient is φ = 38918900592.

The previous prime is 77839964087. The next prime is 77839964131. The reversal of 77839964102 is 20146993877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×77839964102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447548 + ... + 596639.

It is an arithmetic number, because the mean of its divisors is an integer number (14595398817).

Almost surely, 2^77839964102 is an apocalyptic number.

77839964102 is a deficient number, since it is larger than the sum of its proper divisors (38923226434).

77839964102 is a wasteful number, since it uses less digits than its factorization.

77839964102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081462.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 77839964102 in words is "seventy-seven billion, eight hundred thirty-nine million, nine hundred sixty-four thousand, one hundred two".