15972245973 has 12 divisors (see below), whose sum is σ = 23153128908. Its totient is φ = 10610268480.

The previous prime is 15972245881. The next prime is 15972246001. The reversal of 15972245973 is 37954227951.

15972245973 is a `hidden beast` number, since 1 + 59 + 72 + 2 + 459 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9159064209 + 6813181764 = 95703^2 + 82542^2 .

It is not a de Polignac number, because 15972245973 - 2⁹ = 15972245461 is a prime.

It is a super-2 number, since 2×15972245973² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15972245573) 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, 3155290 + ... + 3160347.

It is an arithmetic number, because the mean of its divisors is an integer number (1929427409).

Almost surely, 2^15972245973 is an apocalyptic number.

It is an amenable number.

15972245973 is a deficient number, since it is larger than the sum of its proper divisors (7180882935).

15972245973 is a wasteful number, since it uses less digits than its factorization.

15972245973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6315924 (or 6315921 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 54.

The spelling of 15972245973 in words is "fifteen billion, nine hundred seventy-two million, two hundred forty-five thousand, nine hundred seventy-three".