15659397545 has 16 divisors (see below), whose sum is σ = 20788306560. Its totient is φ = 11228246400.

The previous prime is 15659397541. The next prime is 15659397553. The reversal of 15659397545 is 54579395651.

It is not a de Polignac number, because 15659397545 - 2² = 15659397541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15659397541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2001140 + ... + 2008949.

It is an arithmetic number, because the mean of its divisors is an integer number (1299269160).

Almost surely, 2^15659397545 is an apocalyptic number.

It is an amenable number.

15659397545 is a deficient number, since it is larger than the sum of its proper divisors (5128909015).

15659397545 is a wasteful number, since it uses less digits than its factorization.

15659397545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010176.

The product of its digits is 25515000, while the sum is 59.

The spelling of 15659397545 in words is "fifteen billion, six hundred fifty-nine million, three hundred ninety-seven thousand, five hundred forty-five".