25919999994 has 192 divisors, whose sum is σ = 66647909376. Its totient is φ = 6559308288.

The previous prime is 25919999953. The next prime is 25919999999. The reversal of 25919999994 is 49999991952.

It is not an unprimeable number, because it can be changed into a prime (25919999999) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 58509937 + ... + 58510379.

It is an arithmetic number, because the mean of its divisors is an integer number (347124528).

Almost surely, 2^25919999994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25919999994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33323954688).

25919999994 is an abundant number, since it is smaller than the sum of its proper divisors (40727909382).

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

25919999994 is a wasteful number, since it uses less digits than its factorization.

25919999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 718 counting only the distinct ones).

The product of its digits is 191318760, while the sum is 75.

The spelling of 25919999994 in words is "twenty-five billion, nine hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-four".