25275755640 has 32 divisors (see below), whose sum is σ = 75827267280. Its totient is φ = 6740201472.

The previous prime is 25275755629. The next prime is 25275755741. The reversal of 25275755640 is 4655757252.

It is a self number, because there is not a number n which added to its sum of digits gives 25275755640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105315529 + ... + 105315768.

Almost surely, 2^25275755640 is an apocalyptic number.

25275755640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25275755640 is an abundant number, since it is smaller than the sum of its proper divisors (50551511640).

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

25275755640 is a wasteful number, since it uses less digits than its factorization.

25275755640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210631311 (or 210631307 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 48.

The spelling of 25275755640 in words is "twenty-five billion, two hundred seventy-five million, seven hundred fifty-five thousand, six hundred forty".