2157641393600 has 168 divisors, whose sum is σ = 6619195832448. Its totient is φ = 672511564800.

The previous prime is 2157641393581. The next prime is 2157641393617. The reversal of 2157641393600 is 63931467512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8633462 + ... + 8879861.

Almost surely, 2^{2157641393600} is an apocalyptic number.

2157641393600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2157641393600 is an abundant number, since it is smaller than the sum of its proper divisors (4461554438848).

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

2157641393600 is a wasteful number, since it uses less digits than its factorization.

2157641393600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17513363 (or 17513348 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 2157641393600 in words is "two trillion, one hundred fifty-seven billion, six hundred forty-one million, three hundred ninety-three thousand, six hundred".