25750643730 has 32 divisors (see below), whose sum is σ = 70630337664. Its totient is φ = 5885861376.

The previous prime is 25750643707. The next prime is 25750643731. The reversal of 25750643730 is 3734605752.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (25750643731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61310847 + ... + 61311266.

It is an arithmetic number, because the mean of its divisors is an integer number (2207198052).

Almost surely, 2^25750643730 is an apocalyptic number.

25750643730 is an abundant number, since it is smaller than the sum of its proper divisors (44879693934).

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

25750643730 is a wasteful number, since it uses less digits than its factorization.

25750643730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122622130.

The product of its (nonzero) digits is 529200, while the sum is 42.

The spelling of 25750643730 in words is "twenty-five billion, seven hundred fifty million, six hundred forty-three thousand, seven hundred thirty".