25355683491 has 8 divisors (see below), whose sum is σ = 34721296464. Its totient is φ = 16446929760.

The previous prime is 25355683439. The next prime is 25355683553. The reversal of 25355683491 is 19438655352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25355683491 - 2¹¹ = 25355681443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25355673491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114214680 + ... + 114214901.

It is an arithmetic number, because the mean of its divisors is an integer number (4340162058).

Almost surely, 2^25355683491 is an apocalyptic number.

25355683491 is a deficient number, since it is larger than the sum of its proper divisors (9365612973).

25355683491 is a wasteful number, since it uses less digits than its factorization.

25355683491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228429621.

The product of its digits is 3888000, while the sum is 51.

The spelling of 25355683491 in words is "twenty-five billion, three hundred fifty-five million, six hundred eighty-three thousand, four hundred ninety-one".