2157621416254 has 16 divisors (see below), whose sum is σ = 3262390362000. Its totient is φ = 1070176794624.

The previous prime is 2157621416227. The next prime is 2157621416281. The reversal of 2157621416254 is 4526141267512.

It is an interprime number because it is at equal distance from previous prime (2157621416227) and next prime (2157621416281).

It is a super-3 number, since 3×2157621416254³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4478472 + ... + 4936795.

It is an arithmetic number, because the mean of its divisors is an integer number (203899397625).

Almost surely, 2^{2157621416254} is an apocalyptic number.

2157621416254 is a deficient number, since it is larger than the sum of its proper divisors (1104768945746).

2157621416254 is a wasteful number, since it uses less digits than its factorization.

2157621416254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9416187.

The product of its digits is 806400, while the sum is 46.

The spelling of 2157621416254 in words is "two trillion, one hundred fifty-seven billion, six hundred twenty-one million, four hundred sixteen thousand, two hundred fifty-four".