19972515159 has 12 divisors (see below), whose sum is σ = 29628896856. Its totient is φ = 12955144752.

The previous prime is 19972515137. The next prime is 19972515169. The reversal of 19972515159 is 95151527991.

19972515159 is a `hidden beast` number, since 1 + 9 + 9 + 72 + 51 + 515 + 9 = 666.

It is not a de Polignac number, because 19972515159 - 2¹¹ = 19972513111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19972515109) 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, 29988429 + ... + 29989094.

It is an arithmetic number, because the mean of its divisors is an integer number (2469074738).

Almost surely, 2^19972515159 is an apocalyptic number.

19972515159 is a deficient number, since it is larger than the sum of its proper divisors (9656381697).

19972515159 is a wasteful number, since it uses less digits than its factorization.

19972515159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59977566 (or 59977563 counting only the distinct ones).

The product of its digits is 1275750, while the sum is 54.

The spelling of 19972515159 in words is "nineteen billion, nine hundred seventy-two million, five hundred fifteen thousand, one hundred fifty-nine".