25442434146 has 16 divisors (see below), whose sum is σ = 50886508608. Its totient is φ = 8480538000.

The previous prime is 25442434109. The next prime is 25442434169. The reversal of 25442434146 is 64143424452.

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, 240996 + ... + 330096.

It is an arithmetic number, because the mean of its divisors is an integer number (3180406788).

Almost surely, 2^25442434146 is an apocalyptic number.

25442434146 is an abundant number, since it is smaller than the sum of its proper divisors (25444074462).

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

25442434146 is a wasteful number, since it uses less digits than its factorization.

25442434146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136697.

The product of its digits is 368640, while the sum is 39.

Adding to 25442434146 its reverse (64143424452), we get a palindrome (89585858598).

The spelling of 25442434146 in words is "twenty-five billion, four hundred forty-two million, four hundred thirty-four thousand, one hundred forty-six".