25228203840 has 224 divisors, whose sum is σ = 101713954560. Its totient is φ = 5766432768.

The previous prime is 25228203811. The next prime is 25228203901. The reversal of 25228203840 is 4830282252.

25228203840 is a `hidden beast` number, since 252 + 2 + 8 + 20 + 384 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25228203795 and 25228203804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148087 + ... + 269046.

Almost surely, 2^25228203840 is an apocalyptic number.

25228203840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25228203840 is an abundant number, since it is smaller than the sum of its proper divisors (76485750720).

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

25228203840 is a wasteful number, since it uses less digits than its factorization.

25228203840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417166 (or 417150 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 25228203840 in words is "twenty-five billion, two hundred twenty-eight million, two hundred three thousand, eight hundred forty".