25573378752 has 84 divisors (see below), whose sum is σ = 75200545560. Its totient is φ = 8522243712.

The previous prime is 25573378741. The next prime is 25573378799. The reversal of 25573378752 is 25787337552.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

25573378752 is a `hidden beast` number, since 2 + 557 + 3 + 3 + 7 + 87 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6645693 + ... + 6649539.

It is an arithmetic number, because the mean of its divisors is an integer number (895244590).

Almost surely, 2^25573378752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25573378752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37600272780).

25573378752 is an abundant number, since it is smaller than the sum of its proper divisors (49627166808).

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

25573378752 is an frugal number, since it uses more digits than its factorization.

25573378752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715 (or 3852 counting only the distinct ones).

The product of its digits is 12348000, while the sum is 54.

The spelling of 25573378752 in words is "twenty-five billion, five hundred seventy-three million, three hundred seventy-eight thousand, seven hundred fifty-two".