25430969784 has 256 divisors, whose sum is σ = 73543864320. Its totient is φ = 7318080000.

The previous prime is 25430969779. The next prime is 25430969789. The reversal of 25430969784 is 48796903452.

It is an interprime number because it is at equal distance from previous prime (25430969779) and next prime (25430969789).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430969789) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60405894 + ... + 60406314.

It is an arithmetic number, because the mean of its divisors is an integer number (287280720).

Almost surely, 2^25430969784 is an apocalyptic number.

25430969784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25430969784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36771932160).

25430969784 is an abundant number, since it is smaller than the sum of its proper divisors (48112894536).

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

25430969784 is a wasteful number, since it uses less digits than its factorization.

25430969784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 25430969784 in words is "twenty-five billion, four hundred thirty million, nine hundred sixty-nine thousand, seven hundred eighty-four".