977881419540 has 72 divisors (see below), whose sum is σ = 3008018377728. Its totient is φ = 257095581120.

The previous prime is 977881419539. The next prime is 977881419577. The reversal of 977881419540 is 45914188779.

977881419540 is a `hidden beast` number, since 9 + 7 + 7 + 8 + 81 + 4 + 1 + 9 + 540 = 666.

977881419540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38245492 + ... + 38271051.

It is an arithmetic number, because the mean of its divisors is an integer number (41778033024).

Almost surely, 2^977881419540 is an apocalyptic number.

977881419540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

977881419540 is an abundant number, since it is smaller than the sum of its proper divisors (2030136958188).

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

977881419540 is a wasteful number, since it uses less digits than its factorization.

977881419540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76516629 (or 76516624 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 63.

The spelling of 977881419540 in words is "nine hundred seventy-seven billion, eight hundred eighty-one million, four hundred nineteen thousand, five hundred forty".