25475531740 has 72 divisors (see below), whose sum is σ = 56752309152. Its totient is φ = 9604344960.

The previous prime is 25475531701. The next prime is 25475531771. The reversal of 25475531740 is 4713557452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1413385 + ... + 1431295.

It is an arithmetic number, because the mean of its divisors is an integer number (788226516).

Almost surely, 2^25475531740 is an apocalyptic number.

25475531740 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 25475531740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28376154576).

25475531740 is an abundant number, since it is smaller than the sum of its proper divisors (31276777412).

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

25475531740 is a wasteful number, since it uses less digits than its factorization.

25475531740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18155 (or 18134 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 43.

The spelling of 25475531740 in words is "twenty-five billion, four hundred seventy-five million, five hundred thirty-one thousand, seven hundred forty".