25787278000 has 480 divisors, whose sum is σ = 73910019456. Its totient is φ = 8673280000.

The previous prime is 25787277979. The next prime is 25787278061. The reversal of 25787278000 is 87278752.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 228205944 + ... + 228206056.

Almost surely, 2^25787278000 is an apocalyptic number.

25787278000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25787278000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36955009728).

25787278000 is an abundant number, since it is smaller than the sum of its proper divisors (48122741456).

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

25787278000 is a wasteful number, since it uses less digits than its factorization.

25787278000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The spelling of 25787278000 in words is "twenty-five billion, seven hundred eighty-seven million, two hundred seventy-eight thousand".