25371628069 has 4 divisors (see below), whose sum is σ = 25787556460. Its totient is φ = 24955699680.

The previous prime is 25371628021. The next prime is 25371628099. The reversal of 25371628069 is 96082617352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301022500 + 25070605569 = 17350^2 + 158337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25371628069 is a prime.

It is a super-2 number, since 2×25371628069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25371628099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207964104 + ... + 207964225.

It is an arithmetic number, because the mean of its divisors is an integer number (6446889115).

Almost surely, 2^25371628069 is an apocalyptic number.

It is an amenable number.

25371628069 is a deficient number, since it is larger than the sum of its proper divisors (415928391).

25371628069 is an equidigital number, since it uses as much as digits as its factorization.

25371628069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415928390.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 25371628069 in words is "twenty-five billion, three hundred seventy-one million, six hundred twenty-eight thousand, sixty-nine".