15151665157 has 4 divisors (see below), whose sum is σ = 16042939596. Its totient is φ = 14260390720.

The previous prime is 15151665149. The next prime is 15151665203. The reversal of 15151665157 is 75156615151.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5915301921 + 9236363236 = 76911^2 + 96106^2 .

It is a cyclic number.

It is not a de Polignac number, because 15151665157 - 2³ = 15151665149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15151665107) 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, 445637194 + ... + 445637227.

It is an arithmetic number, because the mean of its divisors is an integer number (4010734899).

Almost surely, 2^15151665157 is an apocalyptic number.

15151665157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15151665157 is a deficient number, since it is larger than the sum of its proper divisors (891274439).

15151665157 is an equidigital number, since it uses as much as digits as its factorization.

15151665157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891274438.

The product of its digits is 157500, while the sum is 43.

The spelling of 15151665157 in words is "fifteen billion, one hundred fifty-one million, six hundred sixty-five thousand, one hundred fifty-seven".