2108191297536 has 416 divisors, whose sum is σ = 6367355760000. Its totient is φ = 697788628992.

The previous prime is 2108191297507. The next prime is 2108191297561. The reversal of 2108191297536 is 6357921918012.

It is a happy number.

2108191297536 is a `hidden beast` number, since 2 + 1 + 0 + 8 + 1 + 9 + 12 + 97 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1406397715 + ... + 1406399213.

Almost surely, 2^{2108191297536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2108191297536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3183677880000).

2108191297536 is an abundant number, since it is smaller than the sum of its proper divisors (4259164462464).

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

2108191297536 is an frugal number, since it uses more digits than its factorization.

2108191297536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 2108191297536 in words is "two trillion, one hundred eight billion, one hundred ninety-one million, two hundred ninety-seven thousand, five hundred thirty-six".