15640041315 has 16 divisors (see below), whose sum is σ = 25025673888. Its totient is φ = 8340819456.

The previous prime is 15640041281. The next prime is 15640041323. The reversal of 15640041315 is 51314004651.

It is a happy number.

It is not a de Polignac number, because 15640041315 - 2⁶ = 15640041251 is a prime.

It is a super-2 number, since 2×15640041315² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347697 + ... + 390093.

It is an arithmetic number, because the mean of its divisors is an integer number (1564104618).

Almost surely, 2^15640041315 is an apocalyptic number.

15640041315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15640041315 is a deficient number, since it is larger than the sum of its proper divisors (9385632573).

15640041315 is a wasteful number, since it uses less digits than its factorization.

15640041315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66998.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 15640041315 its reverse (51314004651), we get a palindrome (66954045966).

The spelling of 15640041315 in words is "fifteen billion, six hundred forty million, forty-one thousand, three hundred fifteen".