25404385720 has 64 divisors (see below), whose sum is σ = 65347430400. Its totient is φ = 8707159680.

The previous prime is 25404385697. The next prime is 25404385723. The reversal of 25404385720 is 2758340452.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25404385723) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 927015 + ... + 954025.

It is an arithmetic number, because the mean of its divisors is an integer number (1021053600).

Almost surely, 2^25404385720 is an apocalyptic number.

25404385720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25404385720 is an abundant number, since it is smaller than the sum of its proper divisors (39943044680).

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

25404385720 is a wasteful number, since it uses less digits than its factorization.

25404385720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30388 (or 30384 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The spelling of 25404385720 in words is "twenty-five billion, four hundred four million, three hundred eighty-five thousand, seven hundred twenty".