15117621148 has 96 divisors (see below), whose sum is σ = 31993758720. Its totient is φ = 6110691840.

The previous prime is 15117621143. The next prime is 15117621199. The reversal of 15117621148 is 84112671151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15117621143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19865088 + ... + 19865848.

It is an arithmetic number, because the mean of its divisors is an integer number (333268320).

Almost surely, 2^15117621148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15117621148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15996879360).

15117621148 is an abundant number, since it is smaller than the sum of its proper divisors (16876137572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15117621148 is a wasteful number, since it uses less digits than its factorization.

15117621148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1185 counting only the distinct ones).

The product of its digits is 13440, while the sum is 37.

The spelling of 15117621148 in words is "fifteen billion, one hundred seventeen million, six hundred twenty-one thousand, one hundred forty-eight".