15539332464016 has 15 divisors (see below), whose sum is σ = 30107487199531. Its totient is φ = 7769658348016.

The previous prime is 15539332463999. The next prime is 15539332464037. The reversal of 15539332464016 is 61046423393551.

The square root of 15539332464016 is 3941996.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15275235 + ... + 16260733.

Almost surely, 2^{15539332464016} is an apocalyptic number.

15539332464016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15539332464016 is the 3941996-th square number.

It is an amenable number.

15539332464016 is a deficient number, since it is larger than the sum of its proper divisors (14568154735515).

15539332464016 is an frugal number, since it uses more digits than its factorization.

15539332464016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971006 (or 985501 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 15539332464016 in words is "fifteen trillion, five hundred thirty-nine billion, three hundred thirty-two million, four hundred sixty-four thousand, sixteen".