25818770543 has 4 divisors (see below), whose sum is σ = 26941325808. Its totient is φ = 24696215280.

The previous prime is 25818770503. The next prime is 25818770573. The reversal of 25818770543 is 34507781852.

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 25818770543 - 2⁸ = 25818770287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25818770491 and 25818770500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25818770503) 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, 561277598 + ... + 561277643.

It is an arithmetic number, because the mean of its divisors is an integer number (6735331452).

Almost surely, 2^25818770543 is an apocalyptic number.

25818770543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25818770543 is a deficient number, since it is larger than the sum of its proper divisors (1122555265).

25818770543 is a wasteful number, since it uses less digits than its factorization.

25818770543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122555264.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 25818770543 in words is "twenty-five billion, eight hundred eighteen million, seven hundred seventy thousand, five hundred forty-three".