25490836543 has 16 divisors (see below), whose sum is σ = 27392486400. Its totient is φ = 23665767840.

The previous prime is 25490836523. The next prime is 25490836559. The reversal of 25490836543 is 34563809452.

It is a cyclic number.

It is not a de Polignac number, because 25490836543 - 2¹³ = 25490828351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25490836523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11688 + ... + 226093.

It is an arithmetic number, because the mean of its divisors is an integer number (1712030400).

Almost surely, 2^25490836543 is an apocalyptic number.

25490836543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25490836543 is a deficient number, since it is larger than the sum of its proper divisors (1901649857).

25490836543 is a wasteful number, since it uses less digits than its factorization.

25490836543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237942.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 25490836543 in words is "twenty-five billion, four hundred ninety million, eight hundred thirty-six thousand, five hundred forty-three".