15545850489 has 81 divisors (see below), whose sum is σ = 25602638607. Its totient is φ = 9084902112.

The previous prime is 15545850367. The next prime is 15545850497. The reversal of 15545850489 is 98405854551.

The square root of 15545850489 is 124683.

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

15545850489 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 58 + 504 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2299682025 + 13246168464 = 47955^2 + 115092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15545850489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15545850499) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 111840582 + ... + 111840720.

Almost surely, 2^15545850489 is an apocalyptic number.

15545850489 is the 124683-rd square number.

15545850489 is the 62342-nd centered octagonal number.

It is an amenable number.

15545850489 is a deficient number, since it is larger than the sum of its proper divisors (10056788118).

15545850489 is a wasteful number, since it uses less digits than its factorization.

15545850489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 15545850489 in words is "fifteen billion, five hundred forty-five million, eight hundred fifty thousand, four hundred eighty-nine".