25920368838 has 192 divisors, whose sum is σ = 73253980800. Its totient is φ = 6438942720.

The previous prime is 25920368827. The next prime is 25920368849. The reversal of 25920368838 is 83886302952.

25920368838 is a `hidden beast` number, since 259 + 20 + 368 + 8 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (25920368827) and next prime (25920368849).

It is a super-2 number, since 2×25920368838² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1940928 + ... + 1954236.

It is an arithmetic number, because the mean of its divisors is an integer number (381531150).

Almost surely, 2^25920368838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25920368838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36626990400).

25920368838 is an abundant number, since it is smaller than the sum of its proper divisors (47333611962).

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

25920368838 is a wasteful number, since it uses less digits than its factorization.

25920368838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407 (or 13404 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 25920368838 in words is "twenty-five billion, nine hundred twenty million, three hundred sixty-eight thousand, eight hundred thirty-eight".