25754591394 has 144 divisors (see below), whose sum is σ = 66335742720. Its totient is φ = 7198813440.

The previous prime is 25754591377. The next prime is 25754591417. The reversal of 25754591394 is 49319545752.

25754591394 is a `hidden beast` number, since 2 + 5 + 7 + 545 + 9 + 1 + 3 + 94 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25754591394.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7871979 + ... + 7875249.

It is an arithmetic number, because the mean of its divisors is an integer number (460664880).

Almost surely, 2^25754591394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25754591394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33167871360).

25754591394 is an abundant number, since it is smaller than the sum of its proper divisors (40581151326).

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

25754591394 is a wasteful number, since it uses less digits than its factorization.

25754591394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485 (or 3475 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 54.

The spelling of 25754591394 in words is "twenty-five billion, seven hundred fifty-four million, five hundred ninety-one thousand, three hundred ninety-four".