25401800402 has 16 divisors (see below), whose sum is σ = 42690004992. Its totient is φ = 11234211120.

The previous prime is 25401800393. The next prime is 25401800423. The reversal of 25401800402 is 20400810452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15602258 + ... + 15603885.

It is an arithmetic number, because the mean of its divisors is an integer number (2668125312).

Almost surely, 2^25401800402 is an apocalyptic number.

25401800402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25401800402 is a deficient number, since it is larger than the sum of its proper divisors (17288204590).

25401800402 is a wasteful number, since it uses less digits than its factorization.

25401800402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31206193.

The product of its (nonzero) digits is 2560, while the sum is 26.

The spelling of 25401800402 in words is "twenty-five billion, four hundred one million, eight hundred thousand, four hundred two".