77908830867 has 48 divisors (see below), whose sum is σ = 133604190720. Its totient is φ = 42821654400.

The previous prime is 77908830841. The next prime is 77908830893. The reversal of 77908830867 is 76803880977.

It is an interprime number because it is at equal distance from previous prime (77908830841) and next prime (77908830893).

It is not a de Polignac number, because 77908830867 - 2¹⁸ = 77908568723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (77908830827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29017 + ... + 395802.

It is an arithmetic number, because the mean of its divisors is an integer number (2783420640).

Almost surely, 2^77908830867 is an apocalyptic number.

77908830867 is a deficient number, since it is larger than the sum of its proper divisors (55695359853).

77908830867 is a wasteful number, since it uses less digits than its factorization.

77908830867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424944 (or 424941 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The spelling of 77908830867 in words is "seventy-seven billion, nine hundred eight million, eight hundred thirty thousand, eight hundred sixty-seven".