15772115109 has 16 divisors (see below), whose sum is σ = 22294865088. Its totient is φ = 9883629312.

The previous prime is 15772115077. The next prime is 15772115113. The reversal of 15772115109 is 90151127751.

It is not a de Polignac number, because 15772115109 - 2⁵ = 15772115077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15772115309) 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, 156342 + ... + 236615.

It is an arithmetic number, because the mean of its divisors is an integer number (1393429068).

Almost surely, 2^15772115109 is an apocalyptic number.

It is an amenable number.

15772115109 is a deficient number, since it is larger than the sum of its proper divisors (6522749979).

15772115109 is a wasteful number, since it uses less digits than its factorization.

15772115109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393764.

The product of its (nonzero) digits is 22050, while the sum is 39.

The spelling of 15772115109 in words is "fifteen billion, seven hundred seventy-two million, one hundred fifteen thousand, one hundred nine".