2261511662056 has 16 divisors (see below), whose sum is σ = 4489765799940. Its totient is φ = 1064240782080.

The previous prime is 2261511661999. The next prime is 2261511662071. The reversal of 2261511662056 is 6502661151622.

It can be written as a sum of positive squares in 2 ways, for example, as 1819353159556 + 442158502500 = 1348834^2 + 664950^2 .

It is a super-2 number, since 2×2261511662056² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8314380975 + ... + 8314381246.

Almost surely, 2^{2261511662056} is an apocalyptic number.

It is an amenable number.

2261511662056 is a deficient number, since it is larger than the sum of its proper divisors (2228254137884).

2261511662056 is a wasteful number, since it uses less digits than its factorization.

2261511662056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628762244 (or 16628762240 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 2261511662056 in words is "two trillion, two hundred sixty-one billion, five hundred eleven million, six hundred sixty-two thousand, fifty-six".