77910048867 has 64 divisors (see below), whose sum is σ = 132331345920. Its totient is φ = 39724253184.

The previous prime is 77910048863. The next prime is 77910048869. The reversal of 77910048867 is 76884001977.

It is a happy number.

It is not a de Polignac number, because 77910048867 - 2² = 77910048863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77910048863) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 885859 + ... + 969827.

It is an arithmetic number, because the mean of its divisors is an integer number (2067677280).

Almost surely, 2^77910048867 is an apocalyptic number.

77910048867 is a deficient number, since it is larger than the sum of its proper divisors (54421297053).

77910048867 is a wasteful number, since it uses less digits than its factorization.

77910048867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84132.

The product of its (nonzero) digits is 4741632, while the sum is 57.

The spelling of 77910048867 in words is "seventy-seven billion, nine hundred ten million, forty-eight thousand, eight hundred sixty-seven".