25405235112 has 32 divisors (see below), whose sum is σ = 65229660000. Its totient is φ = 8239535424.

The previous prime is 25405235111. The next prime is 25405235113. The reversal of 25405235112 is 21153250452.

It is an interprime number because it is at equal distance from previous prime (25405235111) and next prime (25405235113).

It is a self number, because there is not a number n which added to its sum of digits gives 25405235112.

It is not an unprimeable number, because it can be changed into a prime (25405235111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14303862 + ... + 14305637.

It is an arithmetic number, because the mean of its divisors is an integer number (2038426875).

Almost surely, 2^25405235112 is an apocalyptic number.

It is an amenable number.

25405235112 is an abundant number, since it is smaller than the sum of its proper divisors (39824424888).

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

25405235112 is a wasteful number, since it uses less digits than its factorization.

25405235112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28609545 (or 28609541 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 25405235112 its reverse (21153250452), we get a palindrome (46558485564).

The spelling of 25405235112 in words is "twenty-five billion, four hundred five million, two hundred thirty-five thousand, one hundred twelve".