10161555540 has 48 divisors (see below), whose sum is σ = 28795169088. Its totient is φ = 2677099264.

The previous prime is 10161555529. The next prime is 10161555559. The reversal of 10161555540 is 4555516101.

It is a super-4 number, since 4×10161555540⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015257 + ... + 1025216.

It is an arithmetic number, because the mean of its divisors is an integer number (599899356).

Almost surely, 2^10161555540 is an apocalyptic number.

10161555540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10161555540 is an abundant number, since it is smaller than the sum of its proper divisors (18633613548).

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

10161555540 is a wasteful number, since it uses less digits than its factorization.

10161555540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040568 (or 2040566 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 10161555540 in words is "ten billion, one hundred sixty-one million, five hundred fifty-five thousand, five hundred forty".