77388973970 has 32 divisors (see below), whose sum is σ = 173672919936. Its totient is φ = 24121238400.

The previous prime is 77388973933. The next prime is 77388973993. The reversal of 77388973970 is 7937988377.

It is a self number, because there is not a number n which added to its sum of digits gives 77388973970.

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, 50251811 + ... + 50253350.

It is an arithmetic number, because the mean of its divisors is an integer number (5427278748).

Almost surely, 2^77388973970 is an apocalyptic number.

77388973970 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77388973970 is an abundant number, since it is smaller than the sum of its proper divisors (96283945966).

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

77388973970 is a wasteful number, since it uses less digits than its factorization.

77388973970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100505186.

The product of its (nonzero) digits is 112021056, while the sum is 68.

The spelling of 77388973970 in words is "seventy-seven billion, three hundred eighty-eight million, nine hundred seventy-three thousand, nine hundred seventy".