15615265380 has 384 divisors, whose sum is σ = 52682918400. Its totient is φ = 3455063040.

The previous prime is 15615265339. The next prime is 15615265381. The reversal of 15615265380 is 8356251651.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15615265381) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 175452376 + ... + 175452464.

It is an arithmetic number, because the mean of its divisors is an integer number (137195100).

Almost surely, 2^15615265380 is an apocalyptic number.

15615265380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15615265380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26341459200).

15615265380 is an abundant number, since it is smaller than the sum of its proper divisors (37067653020).

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

15615265380 is a wasteful number, since it uses less digits than its factorization.

15615265380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 15615265380 in words is "fifteen billion, six hundred fifteen million, two hundred sixty-five thousand, three hundred eighty".