15664458489 has 16 divisors (see below), whose sum is σ = 21771097920. Its totient is φ = 10005894080.

The previous prime is 15664458449. The next prime is 15664458493. The reversal of 15664458489 is 98485446651.

It is a cyclic number.

It is not a de Polignac number, because 15664458489 - 2⁸ = 15664458233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15664458449) 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, 675822 + ... + 698615.

It is an arithmetic number, because the mean of its divisors is an integer number (1360693620).

Almost surely, 2^15664458489 is an apocalyptic number.

It is an amenable number.

15664458489 is a deficient number, since it is larger than the sum of its proper divisors (6106639431).

15664458489 is a wasteful number, since it uses less digits than its factorization.

15664458489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374600.

The product of its digits is 33177600, while the sum is 60.

The spelling of 15664458489 in words is "fifteen billion, six hundred sixty-four million, four hundred fifty-eight thousand, four hundred eighty-nine".