25041643523 has 4 divisors (see below), whose sum is σ = 26967923808. Its totient is φ = 23115363240.

The previous prime is 25041643519. The next prime is 25041643531. The reversal of 25041643523 is 32534614052.

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 25041643523 - 2² = 25041643519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25041645523) 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, 963140123 + ... + 963140148.

It is an arithmetic number, because the mean of its divisors is an integer number (6741980952).

Almost surely, 2^25041643523 is an apocalyptic number.

25041643523 is a deficient number, since it is larger than the sum of its proper divisors (1926280285).

25041643523 is a wasteful number, since it uses less digits than its factorization.

25041643523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926280284.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 25041643523 in words is "twenty-five billion, forty-one million, six hundred forty-three thousand, five hundred twenty-three".