128977740296940 has 96 divisors (see below), whose sum is σ = 382427099518464. Its totient is φ = 32366986767360.

The previous prime is 128977740296897. The next prime is 128977740296947. The reversal of 128977740296940 is 49692047779821.

It is not an unprimeable number, because it can be changed into a prime (128977740296947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 869907 + ... + 16084533.

It is an arithmetic number, because the mean of its divisors is an integer number (3983615619984).

Almost surely, 2^{128977740296940} is an apocalyptic number.

128977740296940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128977740296940 is an abundant number, since it is smaller than the sum of its proper divisors (253449359221524).

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

128977740296940 is a wasteful number, since it uses less digits than its factorization.

128977740296940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15222967 (or 15222965 counting only the distinct ones).

The product of its (nonzero) digits is 768144384, while the sum is 75.

The spelling of 128977740296940 in words is "one hundred twenty-eight trillion, nine hundred seventy-seven billion, seven hundred forty million, two hundred ninety-six thousand, nine hundred forty".