2256521146664 has 8 divisors (see below), whose sum is σ = 4230977150010. Its totient is φ = 1128260573328.

The previous prime is 2256521146657. The next prime is 2256521146673. The reversal of 2256521146664 is 4666411256522.

It can be written as a sum of positive squares in only one way, i.e., 2254075844164 + 2445302500 = 1501358^2 + 49450^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141032571659 + ... + 141032571674.

Almost surely, 2^{2256521146664} is an apocalyptic number.

It is an amenable number.

2256521146664 is a deficient number, since it is larger than the sum of its proper divisors (1974456003346).

2256521146664 is a wasteful number, since it uses less digits than its factorization.

2256521146664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282065143339 (or 282065143335 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 50.

The spelling of 2256521146664 in words is "two trillion, two hundred fifty-six billion, five hundred twenty-one million, one hundred forty-six thousand, six hundred sixty-four".