2256477664642 has 4 divisors (see below), whose sum is σ = 3384716496966. Its totient is φ = 1128238832320.

The previous prime is 2256477664613. The next prime is 2256477664657. The reversal of 2256477664642 is 2464667746522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1715180503201 + 541297161441 = 1309649^2 + 735729^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564119416159 + ... + 564119416162.

Almost surely, 2^{2256477664642} is an apocalyptic number.

2256477664642 is a deficient number, since it is larger than the sum of its proper divisors (1128238832324).

2256477664642 is a wasteful number, since it uses less digits than its factorization.

2256477664642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128238832323.

The product of its digits is 162570240, while the sum is 61.

The spelling of 2256477664642 in words is "two trillion, two hundred fifty-six billion, four hundred seventy-seven million, six hundred sixty-four thousand, six hundred forty-two".