2158537973760 has 1568 divisors, whose sum is σ = 9282791289600. Its totient is φ = 470877732864.

The previous prime is 2158537973741. The next prime is 2158537973777. The reversal of 2158537973760 is 673797358512.

2158537973760 is a `hidden beast` number, since 2 + 1 + 5 + 8 + 537 + 9 + 7 + 37 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4807434016 + ... + 4807434464.

Almost surely, 2^{2158537973760} is an apocalyptic number.

2158537973760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2158537973760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4641395644800).

2158537973760 is an abundant number, since it is smaller than the sum of its proper divisors (7124253315840).

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

2158537973760 is an frugal number, since it uses more digits than its factorization.

2158537973760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 2158537973760 in words is "two trillion, one hundred fifty-eight billion, five hundred thirty-seven million, nine hundred seventy-three thousand, seven hundred sixty".