15540265323 has 24 divisors (see below), whose sum is σ = 24564988656. Its totient is φ = 9388612800.

The previous prime is 15540265303. The next prime is 15540265343. The reversal of 15540265323 is 32356204551.

It is an interprime number because it is at equal distance from previous prime (15540265303) and next prime (15540265343).

It is not a de Polignac number, because 15540265323 - 2²⁹ = 15003394411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15540265303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216208 + ... + 278973.

It is an arithmetic number, because the mean of its divisors is an integer number (1023541194).

Almost surely, 2^15540265323 is an apocalyptic number.

15540265323 is a deficient number, since it is larger than the sum of its proper divisors (9024723333).

15540265323 is a wasteful number, since it uses less digits than its factorization.

15540265323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495515 (or 495512 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 15540265323 its reverse (32356204551), we get a palindrome (47896469874).

The spelling of 15540265323 in words is "fifteen billion, five hundred forty million, two hundred sixty-five thousand, three hundred twenty-three".