77970329784 has 40 divisors (see below), whose sum is σ = 218389119960. Its totient is φ = 25990109712.

The previous prime is 77970329777. The next prime is 77970329803. The reversal of 77970329784 is 48792307977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60161644 + ... + 60162939.

It is an arithmetic number, because the mean of its divisors is an integer number (5459727999).

Almost surely, 2^77970329784 is an apocalyptic number.

It is an amenable number.

77970329784 is an abundant number, since it is smaller than the sum of its proper divisors (140418790176).

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

77970329784 is a wasteful number, since it uses less digits than its factorization.

77970329784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120324601 (or 120324588 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 63.

The spelling of 77970329784 in words is "seventy-seven billion, nine hundred seventy million, three hundred twenty-nine thousand, seven hundred eighty-four".