12161570840 has 48 divisors (see below), whose sum is σ = 29067865200. Its totient is φ = 4578469376.

The previous prime is 12161570831. The next prime is 12161570849. The reversal of 12161570840 is 4807516121.

It is an interprime number because it is at equal distance from previous prime (12161570831) and next prime (12161570849).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12161570840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161570849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514460 + ... + 537579.

It is an arithmetic number, because the mean of its divisors is an integer number (605580525).

Almost surely, 2^12161570840 is an apocalyptic number.

12161570840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12161570840 is an abundant number, since it is smaller than the sum of its proper divisors (16906294360).

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

12161570840 is a wasteful number, since it uses less digits than its factorization.

12161570840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052084 (or 1052063 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 12161570840 in words is "twelve billion, one hundred sixty-one million, five hundred seventy thousand, eight hundred forty".