15121425623 has 8 divisors (see below), whose sum is σ = 15891279888. Its totient is φ = 14370580224.

The previous prime is 15121425593. The next prime is 15121425661. The reversal of 15121425623 is 32652412151.

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 15121425623 - 2¹⁰ = 15121424599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15121425623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121424623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750586 + ... + 4753767.

It is an arithmetic number, because the mean of its divisors is an integer number (1986409986).

Almost surely, 2^15121425623 is an apocalyptic number.

15121425623 is a deficient number, since it is larger than the sum of its proper divisors (769854265).

15121425623 is an equidigital number, since it uses as much as digits as its factorization.

15121425623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9504433.

The product of its digits is 14400, while the sum is 32.

Adding to 15121425623 its reverse (32652412151), we get a palindrome (47773837774).

The spelling of 15121425623 in words is "fifteen billion, one hundred twenty-one million, four hundred twenty-five thousand, six hundred twenty-three".