25563483623 has 4 divisors (see below), whose sum is σ = 25570105008. Its totient is φ = 25556862240.

The previous prime is 25563483613. The next prime is 25563483689. The reversal of 25563483623 is 32638436552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25563483623 - 2³⁴ = 8383614439 is a prime.

It is a super-2 number, since 2×25563483623² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25563483613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3304898 + ... + 3312623.

It is an arithmetic number, because the mean of its divisors is an integer number (6392526252).

Almost surely, 2^25563483623 is an apocalyptic number.

25563483623 is a deficient number, since it is larger than the sum of its proper divisors (6621385).

25563483623 is an equidigital number, since it uses as much as digits as its factorization.

25563483623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621384.

The product of its digits is 3110400, while the sum is 47.

The spelling of 25563483623 in words is "twenty-five billion, five hundred sixty-three million, four hundred eighty-three thousand, six hundred twenty-three".