3891170486025 has 27 divisors (see below), whose sum is σ = 6969571690471. Its totient is φ = 2075275145040.

The previous prime is 3891170486003. The next prime is 3891170486053. The reversal of 3891170486025 is 5206840711983.

The square root of 3891170486025 is 1972605.

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

3891170486025 is a `hidden beast` number, since 3 + 8 + 91 + 1 + 70 + 486 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1400821374969 + 2490349111056 = 1183563^2 + 1578084^2 .

It is not a de Polignac number, because 3891170486025 - 2¹⁹ = 3891169961737 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, 29523322 + ... + 29654828.

It is a 1-persistent number, because it is pandigital, but 2⋅3891170486025 = 7782340972050 is not.

Almost surely, 2^{3891170486025} is an apocalyptic number.

3891170486025 is the 1972605-th square number.

3891170486025 is the 986303-rd centered octagonal number.

It is an amenable number.

3891170486025 is a deficient number, since it is larger than the sum of its proper divisors (3078401204446).

3891170486025 is an frugal number, since it uses more digits than its factorization.

3891170486025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263030 (or 131515 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 3891170486025 in words is "three trillion, eight hundred ninety-one billion, one hundred seventy million, four hundred eighty-six thousand, twenty-five".