2153749964356 has 27 divisors (see below), whose sum is σ = 3834335905309. Its totient is φ = 1058537745008.

The previous prime is 2153749964351. The next prime is 2153749964363. The reversal of 2153749964356 is 6534699473512.

The square root of 2153749964356 is 1467566.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 77222852100 + 2076527112256 = 277890^2 + 1441016^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153749964351) 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 8 ways as a sum of consecutive naturals, for example, 173166570 + ... + 173179006.

Almost surely, 2^{2153749964356} is an apocalyptic number.

2153749964356 is the 1467566-th square number.

It is an amenable number.

2153749964356 is a deficient number, since it is larger than the sum of its proper divisors (1680585940953).

2153749964356 is an frugal number, since it uses more digits than its factorization.

2153749964356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24996 (or 12498 counting only the distinct ones).

The product of its digits is 146966400, while the sum is 64.

Multiplying 2153749964356 by its sum of digits (64), we get a square (137839997718784 = 11740528²).

The spelling of 2153749964356 in words is "two trillion, one hundred fifty-three billion, seven hundred forty-nine million, nine hundred sixty-four thousand, three hundred fifty-six".