25395071540 has 12 divisors (see below), whose sum is σ = 53329650276. Its totient is φ = 10158028608.

The previous prime is 25395071539. The next prime is 25395071543. The reversal of 25395071540 is 4517059352.

It can be written as a sum of positive squares in 2 ways, for example, as 7255291684 + 18139779856 = 85178^2 + 134684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25395071543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634876769 + ... + 634876808.

It is an arithmetic number, because the mean of its divisors is an integer number (4444137523).

Almost surely, 2^25395071540 is an apocalyptic number.

25395071540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25395071540 is an abundant number, since it is smaller than the sum of its proper divisors (27934578736).

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

25395071540 is a wasteful number, since it uses less digits than its factorization.

25395071540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269753586 (or 1269753584 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 25395071540 in words is "twenty-five billion, three hundred ninety-five million, seventy-one thousand, five hundred forty".