1656921893496 has 32 divisors (see below), whose sum is σ = 4143774326400. Its totient is φ = 552111352160.

The previous prime is 1656921893491. The next prime is 1656921893519. The reversal of 1656921893496 is 6943981296561.

It is a super-2 number, since 2×1656921893496² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1656921893496.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656921893491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12177540 + ... + 12312851.

It is an arithmetic number, because the mean of its divisors is an integer number (129492947700).

Almost surely, 2^{1656921893496} is an apocalyptic number.

It is an amenable number.

1656921893496 is an abundant number, since it is smaller than the sum of its proper divisors (2486852432904).

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

1656921893496 is a wasteful number, since it uses less digits than its factorization.

1656921893496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24493219 (or 24493215 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 69.

The spelling of 1656921893496 in words is "one trillion, six hundred fifty-six billion, nine hundred twenty-one million, eight hundred ninety-three thousand, four hundred ninety-six".