15150661115615 has 4 divisors (see below), whose sum is σ = 18180793338744. Its totient is φ = 12120528892488.

The previous prime is 15150661115573. The next prime is 15150661115651. The reversal of 15150661115615 is 51651116605151.

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 15150661115615 - 2²² = 15150656921311 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, 1515066111557 + ... + 1515066111566.

It is an arithmetic number, because the mean of its divisors is an integer number (4545198334686).

Almost surely, 2^{15150661115615} is an apocalyptic number.

15150661115615 is a deficient number, since it is larger than the sum of its proper divisors (3030132223129).

15150661115615 is an equidigital number, since it uses as much as digits as its factorization.

15150661115615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030132223128.

The product of its (nonzero) digits is 135000, while the sum is 44.

The spelling of 15150661115615 in words is "fifteen trillion, one hundred fifty billion, six hundred sixty-one million, one hundred fifteen thousand, six hundred fifteen".