7730874398025 has 27 divisors (see below), whose sum is σ = 13846929734599. Its totient is φ = 4123110768720.

The previous prime is 7730874398017. The next prime is 7730874398033. The reversal of 7730874398025 is 5208934780377.

The square root of 7730874398025 is 2780445.

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

7730874398025 is a `hidden beast` number, since 77 + 30 + 8 + 7 + 439 + 80 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (7730874398017) and next prime (7730874398033).

It can be written as a sum of positive squares in only one way, i.e., 2783114783289 + 4947759614736 = 1668267^2 + 2224356^2 .

It is not a de Polignac number, because 7730874398025 - 2³ = 7730874398017 is a prime.

It is a super-2 number, since 2×7730874398025² (a number of 27 digits) contains 22 as substring.

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, 41613994 + ... + 41799356.

Almost surely, 2^{7730874398025} is an apocalyptic number.

7730874398025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

7730874398025 is the 2780445-th square number.

7730874398025 is the 1390223-rd centered octagonal number.

It is an amenable number.

7730874398025 is a deficient number, since it is larger than the sum of its proper divisors (6116055336574).

7730874398025 is an frugal number, since it uses more digits than its factorization.

7730874398025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370742 (or 185371 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 7730874398025 in words is "seven trillion, seven hundred thirty billion, eight hundred seventy-four million, three hundred ninety-eight thousand, twenty-five".