15240609813 has 24 divisors (see below), whose sum is σ = 24054269344. Its totient is φ = 8526212640.

The previous prime is 15240609809. The next prime is 15240609817. The reversal of 15240609813 is 31890604251.

It is an interprime number because it is at equal distance from previous prime (15240609809) and next prime (15240609817).

It is not a de Polignac number, because 15240609813 - 2² = 15240609809 is a prime.

It is a super-2 number, since 2×15240609813² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15240609817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1610095 + ... + 1619532.

Almost surely, 2^15240609813 is an apocalyptic number.

15240609813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

15240609813 is a deficient number, since it is larger than the sum of its proper divisors (8813659531).

15240609813 is a wasteful number, since it uses less digits than its factorization.

15240609813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229665 (or 3229654 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 15240609813 in words is "fifteen billion, two hundred forty million, six hundred nine thousand, eight hundred thirteen".