25554012402 has 16 divisors (see below), whose sum is σ = 51115586400. Its totient is φ = 8516743872.

The previous prime is 25554012401. The next prime is 25554012413. The reversal of 25554012402 is 20421045552.

It is a self number, because there is not a number n which added to its sum of digits gives 25554012402.

It is not an unprimeable number, because it can be changed into a prime (25554012401) 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, 270652 + ... + 352647.

It is an arithmetic number, because the mean of its divisors is an integer number (3194724150).

Almost surely, 2^25554012402 is an apocalyptic number.

25554012402 is an abundant number, since it is smaller than the sum of its proper divisors (25561573998).

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

25554012402 is a wasteful number, since it uses less digits than its factorization.

25554012402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630137.

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

Adding to 25554012402 its reverse (20421045552), we get a palindrome (45975057954).

The spelling of 25554012402 in words is "twenty-five billion, five hundred fifty-four million, twelve thousand, four hundred two".