15451620459 has 16 divisors (see below), whose sum is σ = 22479861504. Its totient is φ = 9362628000.

The previous prime is 15451620449. The next prime is 15451620463. The reversal of 15451620459 is 95402615451.

It is a happy number.

It is not a de Polignac number, because 15451620459 - 2⁸ = 15451620203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15451620459.

It is not an unprimeable number, because it can be changed into a prime (15451620449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116097 + ... + 210669.

It is an arithmetic number, because the mean of its divisors is an integer number (1404991344).

Almost surely, 2^15451620459 is an apocalyptic number.

15451620459 is a deficient number, since it is larger than the sum of its proper divisors (7028241045).

15451620459 is a wasteful number, since it uses less digits than its factorization.

15451620459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99538.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 15451620459 in words is "fifteen billion, four hundred fifty-one million, six hundred twenty thousand, four hundred fifty-nine".