25290427693 has 8 divisors (see below), whose sum is σ = 25848908568. Its totient is φ = 24734958144.

The previous prime is 25290427667. The next prime is 25290427711. The reversal of 25290427693 is 39672409252.

It can be written as a sum of positive squares in 4 ways, for example, as 549339844 + 24741087849 = 23438^2 + 157293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25290427693 - 2⁵ = 25290427661 is a prime.

It is a super-2 number, since 2×25290427693² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25290421693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735846 + ... + 769447.

It is an arithmetic number, because the mean of its divisors is an integer number (3231113571).

Almost surely, 2^25290427693 is an apocalyptic number.

It is an amenable number.

25290427693 is a deficient number, since it is larger than the sum of its proper divisors (558480875).

25290427693 is a wasteful number, since it uses less digits than its factorization.

25290427693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505663.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 25290427693 in words is "twenty-five billion, two hundred ninety million, four hundred twenty-seven thousand, six hundred ninety-three".