25665416722 has 12 divisors (see below), whose sum is σ = 42316121358. Its totient is φ = 11666098400.

The previous prime is 25665416719. The next prime is 25665416729. The reversal of 25665416722 is 22761456652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25331587281 + 333829441 = 159159^2 + 18271^2 .

It is not an unprimeable number, because it can be changed into a prime (25665416729) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 53027479 + ... + 53027962.

Almost surely, 2^25665416722 is an apocalyptic number.

25665416722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25665416722 is a deficient number, since it is larger than the sum of its proper divisors (16650704636).

25665416722 is a wasteful number, since it uses less digits than its factorization.

25665416722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106055465 (or 106055454 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The spelling of 25665416722 in words is "twenty-five billion, six hundred sixty-five million, four hundred sixteen thousand, seven hundred twenty-two".