15493572873 has 6 divisors (see below), whose sum is σ = 22379605274. Its totient is φ = 10329048576.

The previous prime is 15493572859. The next prime is 15493572883. The reversal of 15493572873 is 37827539451.

15493572873 is a `hidden beast` number, since 1 + 5 + 4 + 9 + 357 + 287 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15216949449 + 276623424 = 123357^2 + 16632^2 .

It is not a de Polignac number, because 15493572873 - 2¹² = 15493568777 is a prime.

It is a super-2 number, since 2×15493572873² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15493572833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860754040 + ... + 860754057.

Almost surely, 2^15493572873 is an apocalyptic number.

It is an amenable number.

15493572873 is a deficient number, since it is larger than the sum of its proper divisors (6886032401).

15493572873 is a wasteful number, since it uses less digits than its factorization.

15493572873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721508103 (or 1721508100 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 15493572873 in words is "fifteen billion, four hundred ninety-three million, five hundred seventy-two thousand, eight hundred seventy-three".