13861436379025 has 27 divisors (see below), whose sum is σ = 17274922885233. Its totient is φ = 11033466494400.

The previous prime is 13861436378983. The next prime is 13861436379029. The reversal of 13861436379025 is 52097363416831.

The square root of 13861436379025 is 3723095.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4634689925889 + 9226746453136 = 2152833^2 + 3037556^2 .

It is not a de Polignac number, because 13861436379025 - 2⁹ = 13861436378513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13861436379029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3927863461 + ... + 3927866989.

It is a 1-persistent number, because it is pandigital, but 2⋅13861436379025 = 27722872758050 is not.

Almost surely, 2^{13861436379025} is an apocalyptic number.

13861436379025 is the 3723095-th square number.

13861436379025 is the 1861548-th centered octagonal number.

It is an amenable number.

13861436379025 is a deficient number, since it is larger than the sum of its proper divisors (3413486506208).

13861436379025 is an frugal number, since it uses more digits than its factorization.

13861436379025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490 (or 3745 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 58.

The spelling of 13861436379025 in words is "thirteen trillion, eight hundred sixty-one billion, four hundred thirty-six million, three hundred seventy-nine thousand, twenty-five".