77379830820 has 48 divisors (see below), whose sum is σ = 240737253120. Its totient is φ = 20634621408.

The previous prime is 77379830797. The next prime is 77379830831. The reversal of 77379830820 is 2803897377.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71647452 + ... + 71648531.

It is an arithmetic number, because the mean of its divisors is an integer number (5015359440).

Almost surely, 2^77379830820 is an apocalyptic number.

It is an amenable number.

77379830820 is an abundant number, since it is smaller than the sum of its proper divisors (163357422300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77379830820 is a wasteful number, since it uses less digits than its factorization.

77379830820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143296001 (or 143295993 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 77379830820 in words is "seventy-seven billion, three hundred seventy-nine million, eight hundred thirty thousand, eight hundred twenty".