2501728515 has 96 divisors (see below), whose sum is σ = 5316240384. Its totient is φ = 1070910720.

The previous prime is 2501728511. The next prime is 2501728553. The reversal of 2501728515 is 5158271052.

2501728515 is a `hidden beast` number, since 2 + 501 + 72 + 85 + 1 + 5 = 666.

It is not a de Polignac number, because 2501728515 - 2² = 2501728511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2501728515.

It is not an unprimeable number, because it can be changed into a prime (2501728511) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 139554 + ... + 156456.

It is an arithmetic number, because the mean of its divisors is an integer number (55377504).

Almost surely, 2^2501728515 is an apocalyptic number.

2501728515 is an abundant number, since it is smaller than the sum of its proper divisors (2814511869).

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

2501728515 is a wasteful number, since it uses less digits than its factorization.

2501728515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16961 (or 16958 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 2501728515 is about 50017.2821632683. The cubic root of 2501728515 is about 1357.5215303403.

Adding to 2501728515 its reverse (5158271052), we get a palindrome (7659999567).

The spelling of 2501728515 in words is "two billion, five hundred one million, seven hundred twenty-eight thousand, five hundred fifteen".