2256016781651 has 2 divisors, whose sum is σ = 2256016781652. Its totient is φ = 2256016781650.

The previous prime is 2256016781461. The next prime is 2256016781659. The reversal of 2256016781651 is 1561876106522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256016781651 - 2²² = 2256012587347 is a prime.

It is a super-2 number, since 2×2256016781651² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2256016781651.

It is not a weakly prime, because it can be changed into another prime (2256016781659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128008390825 + 1128008390826.

It is an arithmetic number, because the mean of its divisors is an integer number (1128008390826).

Almost surely, 2^{2256016781651} is an apocalyptic number.

2256016781651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256016781651 is an equidigital number, since it uses as much as digits as its factorization.

2256016781651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 2256016781651 in words is "two trillion, two hundred fifty-six billion, sixteen million, seven hundred eighty-one thousand, six hundred fifty-one".