10215661775 has 24 divisors (see below), whose sum is σ = 13823583984. Its totient is φ = 7427110400.

The previous prime is 10215661769. The next prime is 10215661783. The reversal of 10215661775 is 57716651201.

It is not a de Polignac number, because 10215661775 - 2⁴ = 10215661759 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1453169 + ... + 1460181.

It is an arithmetic number, because the mean of its divisors is an integer number (575982666).

Almost surely, 2^10215661775 is an apocalyptic number.

10215661775 is a deficient number, since it is larger than the sum of its proper divisors (3607922209).

10215661775 is a wasteful number, since it uses less digits than its factorization.

10215661775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12331 (or 12326 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 10215661775 in words is "ten billion, two hundred fifteen million, six hundred sixty-one thousand, seven hundred seventy-five".