77864841 has 16 divisors (see below), whose sum is σ = 115948800. Its totient is φ = 51642864.

The previous prime is 77864833. The next prime is 77864851. The reversal of 77864841 is 14846877.

It is not a de Polignac number, because 77864841 - 2³ = 77864833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77864851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001 + ... + 12638.

It is an arithmetic number, because the mean of its divisors is an integer number (7246800).

Almost surely, 2^77864841 is an apocalyptic number.

It is an amenable number.

77864841 is a deficient number, since it is larger than the sum of its proper divisors (38083959).

77864841 is a wasteful number, since it uses less digits than its factorization.

77864841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14845 (or 14839 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 77864841 is about 8824.1056770644. The cubic root of 77864841 is about 427.0189356249.

The spelling of 77864841 in words is "seventy-seven million, eight hundred sixty-four thousand, eight hundred forty-one".