15615150641 has 4 divisors (see below), whose sum is σ = 16533688932. Its totient is φ = 14696612352.

The previous prime is 15615150623. The next prime is 15615150757. The reversal of 15615150641 is 14605151651.

It is a happy number.

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 5916840241 + 9698310400 = 76921^2 + 98480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15615150641 is a prime.

It is a super-2 number, since 2×15615150641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15615150841) 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, 459269120 + ... + 459269153.

It is an arithmetic number, because the mean of its divisors is an integer number (4133422233).

Almost surely, 2^15615150641 is an apocalyptic number.

It is an amenable number.

15615150641 is a deficient number, since it is larger than the sum of its proper divisors (918538291).

15615150641 is an equidigital number, since it uses as much as digits as its factorization.

15615150641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918538290.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 15615150641 in words is "fifteen billion, six hundred fifteen million, one hundred fifty thousand, six hundred forty-one".