25655311464 has 64 divisors (see below), whose sum is σ = 65812400640. Its totient is φ = 8329251840.

The previous prime is 25655311463. The next prime is 25655311471. The reversal of 25655311464 is 46411355652.

It is not an unprimeable number, because it can be changed into a prime (25655311463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575812 + ... + 618764.

It is an arithmetic number, because the mean of its divisors is an integer number (1028318760).

Almost surely, 2^25655311464 is an apocalyptic number.

25655311464 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 25655311464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32906200320).

25655311464 is an abundant number, since it is smaller than the sum of its proper divisors (40157089176).

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

25655311464 is a wasteful number, since it uses less digits than its factorization.

25655311464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43610 (or 43606 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The spelling of 25655311464 in words is "twenty-five billion, six hundred fifty-five million, three hundred eleven thousand, four hundred sixty-four".