1657540983768 has 32 divisors (see below), whose sum is σ = 4145337346560. Its totient is φ = 552315676320.

The previous prime is 1657540983701. The next prime is 1657540983773. The reversal of 1657540983768 is 8673890457561.

It is a super-2 number, since 2×1657540983768² (a number of 25 digits) contains 22 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, 12305680 + ... + 12439647.

It is an arithmetic number, because the mean of its divisors is an integer number (129541792080).

Almost surely, 2^{1657540983768} is an apocalyptic number.

It is an amenable number.

1657540983768 is an abundant number, since it is smaller than the sum of its proper divisors (2487796362792).

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

1657540983768 is a wasteful number, since it uses less digits than its factorization.

1657540983768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24748127 (or 24748123 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 69.

The spelling of 1657540983768 in words is "one trillion, six hundred fifty-seven billion, five hundred forty million, nine hundred eighty-three thousand, seven hundred sixty-eight".