1977341538816 has 200 divisors, whose sum is σ = 6744965377920. Its totient is φ = 564954642432.

The previous prime is 1977341538803. The next prime is 1977341538841. The reversal of 1977341538816 is 6188351437791.

1977341538816 is a `hidden beast` number, since 1 + 97 + 7 + 3 + 4 + 1 + 538 + 8 + 1 + 6 = 666.

It is a super-2 number, since 2×1977341538816² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3115336 + ... + 3695943.

Almost surely, 2^{1977341538816} is an apocalyptic number.

1977341538816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1977341538816 is an abundant number, since it is smaller than the sum of its proper divisors (4767623839104).

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

1977341538816 is an frugal number, since it uses more digits than its factorization.

1977341538816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6811316 (or 6811291 counting only the distinct ones).

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

The spelling of 1977341538816 in words is "one trillion, nine hundred seventy-seven billion, three hundred forty-one million, five hundred thirty-eight thousand, eight hundred sixteen".