25466652801 has 20 divisors (see below), whose sum is σ = 38047168852. Its totient is φ = 16975808928.

The previous prime is 25466652773. The next prime is 25466652803. The reversal of 25466652801 is 10825666452.

It can be written as a sum of positive squares in 2 ways, for example, as 5845367025 + 19621285776 = 76455^2 + 140076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25466652801 is a prime.

It is a super-2 number, since 2×25466652801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25466652803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1146735 + ... + 1168731.

Almost surely, 2^25466652801 is an apocalyptic number.

It is an amenable number.

25466652801 is a deficient number, since it is larger than the sum of its proper divisors (12580516051).

25466652801 is a wasteful number, since it uses less digits than its factorization.

25466652801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36302 (or 36293 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 25466652801 in words is "twenty-five billion, four hundred sixty-six million, six hundred fifty-two thousand, eight hundred one".