15252440312345 has 8 divisors (see below), whose sum is σ = 18395836641864. Its totient is φ = 12140013405184.

The previous prime is 15252440312281. The next prime is 15252440312353. The reversal of 15252440312345 is 54321304425251.

It can be written as a sum of positive squares in 4 ways, for example, as 7823343256576 + 7429097055769 = 2797024^2 + 2725637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15252440312345 - 2⁶ = 15252440312281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7742354504 + ... + 7742356473.

It is an arithmetic number, because the mean of its divisors is an integer number (2299479580233).

Almost surely, 2^{15252440312345} is an apocalyptic number.

It is an amenable number.

15252440312345 is a deficient number, since it is larger than the sum of its proper divisors (3143396329519).

15252440312345 is a wasteful number, since it uses less digits than its factorization.

15252440312345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15484711179.

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 15252440312345 its reverse (54321304425251), we get a palindrome (69573744737596).

The spelling of 15252440312345 in words is "fifteen trillion, two hundred fifty-two billion, four hundred forty million, three hundred twelve thousand, three hundred forty-five".