15515156040 has 256 divisors, whose sum is σ = 50458464000. Its totient is φ = 3803627520.

The previous prime is 15515156011. The next prime is 15515156057. The reversal of 15515156040 is 4065151551.

It is a junction number, because it is equal to n+sod(n) for n = 15515155992 and 15515156010.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25145812 + ... + 25146428.

It is an arithmetic number, because the mean of its divisors is an integer number (197103375).

Almost surely, 2^15515156040 is an apocalyptic number.

15515156040 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 15515156040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25229232000).

15515156040 is an abundant number, since it is smaller than the sum of its proper divisors (34943307960).

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

15515156040 is a wasteful number, since it uses less digits than its factorization.

15515156040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 15515156040 in words is "fifteen billion, five hundred fifteen million, one hundred fifty-six thousand, forty".