25123645069 has 4 divisors (see below), whose sum is σ = 25283668444. Its totient is φ = 24963621696.

The previous prime is 25123645049. The next prime is 25123645091. The reversal of 25123645069 is 96054632152.

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 16081536969 + 9042108100 = 126813^2 + 95090^2 .

It is a cyclic number.

It is not a de Polignac number, because 25123645069 - 2⁵ = 25123645037 is a prime.

It is a super-2 number, since 2×25123645069² (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 (25123645009) 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, 80011452 + ... + 80011765.

It is an arithmetic number, because the mean of its divisors is an integer number (6320917111).

Almost surely, 2^25123645069 is an apocalyptic number.

It is an amenable number.

25123645069 is a deficient number, since it is larger than the sum of its proper divisors (160023375).

25123645069 is a wasteful number, since it uses less digits than its factorization.

25123645069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160023374.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 25123645069 in words is "twenty-five billion, one hundred twenty-three million, six hundred forty-five thousand, sixty-nine".