2643697143025 has 9 divisors (see below), whose sum is σ = 3278194538241. Its totient is φ = 2114951210640.

The previous prime is 2643697143019. The next prime is 2643697143037. The reversal of 2643697143025 is 5203417963462.

The square root of 2643697143025 is 1625945.

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

2643697143025 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 803376993969 + 1840320149056 = 896313^2 + 1356584^2 .

It is not a de Polignac number, because 2643697143025 - 2⁵ = 2643697142993 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, 7967131 + ... + 8292319.

Almost surely, 2^{2643697143025} is an apocalyptic number.

2643697143025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2643697143025 is the 1625945-th square number.

2643697143025 is the 812973-rd centered octagonal number.

It is an amenable number.

2643697143025 is a deficient number, since it is larger than the sum of its proper divisors (634497395216).

2643697143025 is an frugal number, since it uses more digits than its factorization.

2643697143025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650388 (or 325194 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 2643697143025 in words is "two trillion, six hundred forty-three billion, six hundred ninety-seven million, one hundred forty-three thousand, twenty-five".