2121457886164 has 6 divisors (see below), whose sum is σ = 3712551300794. Its totient is φ = 1060728943080.

The previous prime is 2121457886153. The next prime is 2121457886203. The reversal of 2121457886164 is 4616887541212.

It can be written as a sum of positive squares in only one way, i.e., 1386223664400 + 735234221764 = 1177380^2 + 857458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265182235767 + ... + 265182235774.

Almost surely, 2^{2121457886164} is an apocalyptic number.

It is an amenable number.

2121457886164 is a deficient number, since it is larger than the sum of its proper divisors (1591093414630).

2121457886164 is a wasteful number, since it uses less digits than its factorization.

2121457886164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530364471545 (or 530364471543 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The spelling of 2121457886164 in words is "two trillion, one hundred twenty-one billion, four hundred fifty-seven million, eight hundred eighty-six thousand, one hundred sixty-four".