7974382971025 has 9 divisors (see below), whose sum is σ = 9888252392251. Its totient is φ = 6379495081240.

The previous prime is 7974382971019. The next prime is 7974382971041. The reversal of 7974382971025 is 5201792834797.

The square root of 7974382971025 is 2823895.

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., 2870777869569 + 5103605101456 = 1694337^2 + 2259116^2 .

It is not a de Polignac number, because 7974382971025 - 2²¹ = 7974380873873 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, 13837086 + ... + 14401864.

Almost surely, 2^{7974382971025} is an apocalyptic number.

7974382971025 is the 2823895-th square number.

7974382971025 is the 1411948-th centered octagonal number.

It is an amenable number.

7974382971025 is a deficient number, since it is larger than the sum of its proper divisors (1913869421226).

7974382971025 is an frugal number, since it uses more digits than its factorization.

7974382971025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129568 (or 564784 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 64.

Multiplying 7974382971025 by its sum of digits (64), we get a square (510360510145600 = 22591160²).

The spelling of 7974382971025 in words is "seven trillion, nine hundred seventy-four billion, three hundred eighty-two million, nine hundred seventy-one thousand, twenty-five".