15916549098025 has 9 divisors (see below), whose sum is σ = 19736545616823. Its totient is φ = 12733223320200.

The previous prime is 15916549098011. The next prime is 15916549098083. The reversal of 15916549098025 is 52089094561951.

It is a happy number.

The square root of 15916549098025 is 3989555.

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

It can be written as a sum of positive squares in only one way, i.e., 5729957675289 + 10186591422736 = 2393733^2 + 3191644^2 .

It is a de Polignac number, because none of the positive numbers 2^k-15916549098025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19548820 + ... + 20346730.

Almost surely, 2^{15916549098025} is an apocalyptic number.

15916549098025 is the 3989555-th square number.

15916549098025 is the 1994778-th centered octagonal number.

It is an amenable number.

15916549098025 is a deficient number, since it is larger than the sum of its proper divisors (3819996518798).

15916549098025 is an frugal number, since it uses more digits than its factorization.

15916549098025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595832 (or 797916 counting only the distinct ones).

The product of its (nonzero) digits is 34992000, while the sum is 64.

The spelling of 15916549098025 in words is "fifteen trillion, nine hundred sixteen billion, five hundred forty-nine million, ninety-eight thousand, twenty-five".