15640083168465 has 96 divisors (see below), whose sum is σ = 29521838361600. Its totient is φ = 7049138576256.

The previous prime is 15640083168449. The next prime is 15640083168491. The reversal of 15640083168465 is 56486138004651.

It is a happy number.

It is not a de Polignac number, because 15640083168465 - 2⁴ = 15640083168449 is a prime.

It is a super-2 number, since 2×15640083168465² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16729986 + ... + 17640084.

It is an arithmetic number, because the mean of its divisors is an integer number (307519149600).

Almost surely, 2^{15640083168465} is an apocalyptic number.

15640083168465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15640083168465 is a deficient number, since it is larger than the sum of its proper divisors (13881755193135).

15640083168465 is a wasteful number, since it uses less digits than its factorization.

15640083168465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910451 (or 910444 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 57.

The spelling of 15640083168465 in words is "fifteen trillion, six hundred forty billion, eighty-three million, one hundred sixty-eight thousand, four hundred sixty-five".