10326515661 has 64 divisors (see below), whose sum is σ = 19517245440. Its totient is φ = 5239624320.

The previous prime is 10326515659. The next prime is 10326515701. The reversal of 10326515661 is 16651562301.

10326515661 is a `hidden beast` number, since 1 + 0 + 32 + 65 + 1 + 566 + 1 = 666.

It is not a de Polignac number, because 10326515661 - 2¹ = 10326515659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10326510661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31641 + ... + 147153.

It is an arithmetic number, because the mean of its divisors is an integer number (304956960).

Almost surely, 2^10326515661 is an apocalyptic number.

10326515661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10326515661 is a deficient number, since it is larger than the sum of its proper divisors (9190729779).

10326515661 is a wasteful number, since it uses less digits than its factorization.

10326515661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115583 (or 115577 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 10326515661 in words is "ten billion, three hundred twenty-six million, five hundred fifteen thousand, six hundred sixty-one".