25642977030 has 384 divisors, whose sum is σ = 80055360000. Its totient is φ = 5819869440.

The previous prime is 25642977001. The next prime is 25642977047. The reversal of 25642977030 is 3077924652.

It is a super-2 number, since 2×25642977030² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 67659381 + ... + 67659759.

It is an arithmetic number, because the mean of its divisors is an integer number (208477500).

Almost surely, 2^25642977030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25642977030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40027680000).

25642977030 is an abundant number, since it is smaller than the sum of its proper divisors (54412382970).

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

25642977030 is a wasteful number, since it uses less digits than its factorization.

25642977030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 25642977030 in words is "twenty-five billion, six hundred forty-two million, nine hundred seventy-seven thousand, thirty".