15478362405025 has 27 divisors (see below), whose sum is σ = 20783479451961. Its totient is φ = 11429986470240.

The previous prime is 15478362405019. The next prime is 15478362405047. The reversal of 15478362405025 is 52050426387451.

The square root of 15478362405025 is 3934255.

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

15478362405025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3989570806881 + 11488791598144 = 1997391^2 + 3389512^2 .

It is not a de Polignac number, because 15478362405025 - 2¹⁵ = 15478362372257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 255696312 + ... + 255756838.

Almost surely, 2^{15478362405025} is an apocalyptic number.

15478362405025 is the 3934255-th square number.

15478362405025 is the 1967128-th centered octagonal number.

It is an amenable number.

15478362405025 is a deficient number, since it is larger than the sum of its proper divisors (5305117046936).

15478362405025 is an frugal number, since it uses more digits than its factorization.

15478362405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121090 (or 60545 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 15478362405025 in words is "fifteen trillion, four hundred seventy-eight billion, three hundred sixty-two million, four hundred five thousand, twenty-five".