25402105452 has 12 divisors (see below), whose sum is σ = 59271579416. Its totient is φ = 8467368480.

The previous prime is 25402105447. The next prime is 25402105457. The reversal of 25402105452 is 25450120452.

It is an interprime number because it is at equal distance from previous prime (25402105447) and next prime (25402105457).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×25402105452² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25402105457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058421049 + ... + 1058421072.

Almost surely, 2^25402105452 is an apocalyptic number.

It is an amenable number.

25402105452 is an abundant number, since it is smaller than the sum of its proper divisors (33869473964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25402105452 is a wasteful number, since it uses less digits than its factorization.

25402105452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116842128 (or 2116842126 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 25402105452 in words is "twenty-five billion, four hundred two million, one hundred five thousand, four hundred fifty-two".