15515056505015 has 4 divisors (see below), whose sum is σ = 18618067806024. Its totient is φ = 12412045204008.

The previous prime is 15515056504957. The next prime is 15515056505051. The reversal of 15515056505015 is 51050565051551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15515056505015 - 2²⁴ = 15515039727799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1551505650497 + ... + 1551505650506.

It is an arithmetic number, because the mean of its divisors is an integer number (4654516951506).

Almost surely, 2^{15515056505015} is an apocalyptic number.

15515056505015 is a deficient number, since it is larger than the sum of its proper divisors (3103011301009).

15515056505015 is an equidigital number, since it uses as much as digits as its factorization.

15515056505015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103011301008.

The product of its (nonzero) digits is 468750, while the sum is 44.

The spelling of 15515056505015 in words is "fifteen trillion, five hundred fifteen billion, fifty-six million, five hundred five thousand, fifteen".