25390078530 has 32 divisors (see below), whose sum is σ = 60942495744. Its totient is φ = 6769986816.

The previous prime is 25390078529. The next prime is 25390078531. The reversal of 25390078530 is 3587009352.

It is an interprime number because it is at equal distance from previous prime (25390078529) and next prime (25390078531).

It is a super-3 number, since 3×25390078530³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25390078531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293439 + ... + 369981.

It is an arithmetic number, because the mean of its divisors is an integer number (1904452992).

Almost surely, 2^25390078530 is an apocalyptic number.

25390078530 is an abundant number, since it is smaller than the sum of its proper divisors (35552417214).

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

25390078530 is a wasteful number, since it uses less digits than its factorization.

25390078530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87610.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 25390078530 in words is "twenty-five billion, three hundred ninety million, seventy-eight thousand, five hundred thirty".