7854258477025 has 27 divisors (see below), whose sum is σ = 9777745032139. Its totient is φ = 6258688334720.

The previous prime is 7854258477011. The next prime is 7854258477041. The reversal of 7854258477025 is 5207748524587.

The square root of 7854258477025 is 2802545.

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

It can be written as a sum of positive squares in 13 ways, for example, as 13452056289 + 7840806420736 = 115983^2 + 2800144^2 .

It is not a de Polignac number, because 7854258477025 - 2⁴¹ = 5655235221473 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, 4105727469 + ... + 4105729381.

Almost surely, 2^{7854258477025} is an apocalyptic number.

7854258477025 is the 2802545-th square number.

7854258477025 is the 1401273-rd centered octagonal number.

It is an amenable number.

7854258477025 is a deficient number, since it is larger than the sum of its proper divisors (1923486555114).

7854258477025 is an frugal number, since it uses more digits than its factorization.

7854258477025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 175616000, while the sum is 64.

Multiplying 7854258477025 by its sum of digits (64), we get a square (502672542529600 = 22420360²).

The spelling of 7854258477025 in words is "seven trillion, eight hundred fifty-four billion, two hundred fifty-eight million, four hundred seventy-seven thousand, twenty-five".