25401019432 has 8 divisors (see below), whose sum is σ = 47626911450. Its totient is φ = 12700509712.

The previous prime is 25401019411. The next prime is 25401019451. The reversal of 25401019432 is 23491010452.

It can be written as a sum of positive squares in only one way, i.e., 14673445956 + 10727573476 = 121134^2 + 103574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 25401019394 and 25401019403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1587563707 + ... + 1587563722.

Almost surely, 2^25401019432 is an apocalyptic number.

It is an amenable number.

25401019432 is a deficient number, since it is larger than the sum of its proper divisors (22225892018).

25401019432 is a wasteful number, since it uses less digits than its factorization.

25401019432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175127435 (or 3175127431 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 25401019432 its reverse (23491010452), we get a palindrome (48892029884).

The spelling of 25401019432 in words is "twenty-five billion, four hundred one million, nineteen thousand, four hundred thirty-two".