10645256664555 has 32 divisors (see below), whose sum is σ = 17774121530880. Its totient is φ = 5430265800960.

The previous prime is 10645256664529. The next prime is 10645256664563. The reversal of 10645256664555 is 55546665254601.

It is not a de Polignac number, because 10645256664555 - 2⁸ = 10645256664299 is a prime.

It is a super-2 number, since 2×10645256664555² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4265620 + ... + 6283790.

It is an arithmetic number, because the mean of its divisors is an integer number (555441297840).

Almost surely, 2^{10645256664555} is an apocalyptic number.

10645256664555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10645256664555 is a deficient number, since it is larger than the sum of its proper divisors (7128864866325).

10645256664555 is a wasteful number, since it uses less digits than its factorization.

10645256664555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033491.

The product of its (nonzero) digits is 129600000, while the sum is 60.

The spelling of 10645256664555 in words is "ten trillion, six hundred forty-five billion, two hundred fifty-six million, six hundred sixty-four thousand, five hundred fifty-five".