25551236368 has 160 divisors (see below), whose sum is σ = 61075662336. Its totient is φ = 10107224064.

The previous prime is 25551236311. The next prime is 25551236371. The reversal of 25551236368 is 86363215552.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 22160080 + ... + 22161232.

Almost surely, 2^25551236368 is an apocalyptic number.

25551236368 is a gapful number since it is divisible by the number (28) 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 25551236368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30537831168).

25551236368 is an abundant number, since it is smaller than the sum of its proper divisors (35524425968).

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

25551236368 is a wasteful number, since it uses less digits than its factorization.

25551236368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1395 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The spelling of 25551236368 in words is "twenty-five billion, five hundred fifty-one million, two hundred thirty-six thousand, three hundred sixty-eight".