1977195420468 has 72 divisors (see below), whose sum is σ = 5120109461376. Its totient is φ = 642952886400.

The previous prime is 1977195420437. The next prime is 1977195420481. The reversal of 1977195420468 is 8640245917791.

1977195420468 is a `hidden beast` number, since 1 + 9 + 77 + 19 + 542 + 0 + 4 + 6 + 8 = 666.

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, 37498003 + ... + 37550693.

It is an arithmetic number, because the mean of its divisors is an integer number (71112631408).

Almost surely, 2^{1977195420468} is an apocalyptic number.

1977195420468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1977195420468 is an abundant number, since it is smaller than the sum of its proper divisors (3142914040908).

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

1977195420468 is a wasteful number, since it uses less digits than its factorization.

1977195420468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78165 (or 78160 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 1977195420468 in words is "one trillion, nine hundred seventy-seven billion, one hundred ninety-five million, four hundred twenty thousand, four hundred sixty-eight".