10515707980 has 48 divisors (see below), whose sum is σ = 23019020640. Its totient is φ = 4030208000.

The previous prime is 10515707857. The next prime is 10515707987. The reversal of 10515707980 is 8970751501.

It is a super-2 number, since 2×10515707980² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10515707987) 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, 6780 + ... + 145180.

It is an arithmetic number, because the mean of its divisors is an integer number (479562930).

Almost surely, 2^10515707980 is an apocalyptic number.

10515707980 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 10515707980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11509510320).

10515707980 is an abundant number, since it is smaller than the sum of its proper divisors (12503312660).

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

10515707980 is a wasteful number, since it uses less digits than its factorization.

10515707980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138570 (or 138568 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 43.

The spelling of 10515707980 in words is "ten billion, five hundred fifteen million, seven hundred seven thousand, nine hundred eighty".