2156661450512 has 10 divisors (see below), whose sum is σ = 4178531560398. Its totient is φ = 1078330725248.

The previous prime is 2156661450443. The next prime is 2156661450533. The reversal of 2156661450512 is 2150541666512.

It can be written as a sum of positive squares in only one way, i.e., 2154566008336 + 2095442176 = 1467844^2 + 45776^2 .

It is a super-2 number, since 2×2156661450512² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67395670313 + ... + 67395670344.

Almost surely, 2^{2156661450512} is an apocalyptic number.

It is an amenable number.

2156661450512 is a deficient number, since it is larger than the sum of its proper divisors (2021870109886).

2156661450512 is a wasteful number, since it uses less digits than its factorization.

2156661450512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134791340665 (or 134791340659 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 2156661450512 in words is "two trillion, one hundred fifty-six billion, six hundred sixty-one million, four hundred fifty thousand, five hundred twelve".