25251655340 has 48 divisors (see below), whose sum is σ = 53273493504. Its totient is φ = 10054065600.

The previous prime is 25251655181. The next prime is 25251655369. The reversal of 25251655340 is 4355615252.

It is a junction number, because it is equal to n+sod(n) for n = 25251655294 and 25251655303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11440517 + ... + 11442723.

It is an arithmetic number, because the mean of its divisors is an integer number (1109864448).

Almost surely, 2^25251655340 is an apocalyptic number.

25251655340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25251655340 is an abundant number, since it is smaller than the sum of its proper divisors (28021838164).

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

25251655340 is a wasteful number, since it uses less digits than its factorization.

25251655340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598 (or 4596 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 25251655340 in words is "twenty-five billion, two hundred fifty-one million, six hundred fifty-five thousand, three hundred forty".