15115615001 has 4 divisors (see below), whose sum is σ = 15156139812. Its totient is φ = 15075090192.

The previous prime is 15115614979. The next prime is 15115615013. The reversal of 15115615001 is 10051651151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10051651151 = 41491 ⋅242261.

It can be written as a sum of positive squares in 2 ways, for example, as 6532518976 + 8583096025 = 80824^2 + 92645^2 .

It is a cyclic number.

It is not a de Polignac number, because 15115615001 - 2⁶ = 15115614937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15115615901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20261846 + ... + 20262591.

It is an arithmetic number, because the mean of its divisors is an integer number (3789034953).

Almost surely, 2^15115615001 is an apocalyptic number.

It is an amenable number.

15115615001 is a deficient number, since it is larger than the sum of its proper divisors (40524811).

15115615001 is an equidigital number, since it uses as much as digits as its factorization.

15115615001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40524810.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 15115615001 in words is "fifteen billion, one hundred fifteen million, six hundred fifteen thousand, one".