15394541913 has 20 divisors (see below), whose sum is σ = 24349539060. Its totient is φ = 9659319552.

The previous prime is 15394541887. The next prime is 15394541941. The reversal of 15394541913 is 31914549351.

15394541913 is a `hidden beast` number, since 1 + 5 + 3 + 9 + 454 + 191 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7885972809 + 7508569104 = 88803^2 + 86652^2 .

It is not a de Polignac number, because 15394541913 - 2⁵ = 15394541881 is a prime.

It is a super-2 number, since 2×15394541913² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15394541963) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5588508 + ... + 5591261.

It is an arithmetic number, because the mean of its divisors is an integer number (1217476953).

Almost surely, 2^15394541913 is an apocalyptic number.

It is an amenable number.

15394541913 is a deficient number, since it is larger than the sum of its proper divisors (8954997147).

15394541913 is a wasteful number, since it uses less digits than its factorization.

15394541913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179798 (or 11179789 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The spelling of 15394541913 in words is "fifteen billion, three hundred ninety-four million, five hundred forty-one thousand, nine hundred thirteen".