101561395768 has 32 divisors (see below), whose sum is σ = 217692165600. Its totient is φ = 43514191872.

The previous prime is 101561395763. The next prime is 101561395783. The reversal of 101561395768 is 867593165101.

It is a super-2 number, since 2×101561395768² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101561395763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48153 + ... + 453256.

It is an arithmetic number, because the mean of its divisors is an integer number (6802880175).

Almost surely, 2^101561395768 is an apocalyptic number.

It is an amenable number.

101561395768 is an abundant number, since it is smaller than the sum of its proper divisors (116130769832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101561395768 is a wasteful number, since it uses less digits than its factorization.

101561395768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505039 (or 505035 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 101561395768 in words is "one hundred one billion, five hundred sixty-one million, three hundred ninety-five thousand, seven hundred sixty-eight".