25444444452 has 24 divisors (see below), whose sum is σ = 67851852096. Its totient is φ = 7269841248.

The previous prime is 25444444429. The next prime is 25444444463.

25444444452 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151454943 + ... + 151455110.

It is an arithmetic number, because the mean of its divisors is an integer number (2827160504).

Almost surely, 2^25444444452 is an apocalyptic number.

It is an amenable number.

25444444452 is an abundant number, since it is smaller than the sum of its proper divisors (42407407644).

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

25444444452 is a wasteful number, since it uses less digits than its factorization.

25444444452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302910067 (or 302910065 counting only the distinct ones).

The product of its digits is 1638400, while the sum is 42.

The spelling of 25444444452 in words is "twenty-five billion, four hundred forty-four million, four hundred forty-four thousand, four hundred fifty-two".