25420766843 has 16 divisors (see below), whose sum is σ = 27695652000. Its totient is φ = 23240431872.

The previous prime is 25420766837. The next prime is 25420766851. The reversal of 25420766843 is 34866702452.

It is a cyclic number.

It is not a de Polignac number, because 25420766843 - 2²² = 25416572539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25420766873) 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, 1166693 + ... + 1188281.

It is an arithmetic number, because the mean of its divisors is an integer number (1730978250).

Almost surely, 2^25420766843 is an apocalyptic number.

25420766843 is a deficient number, since it is larger than the sum of its proper divisors (2274885157).

25420766843 is a wasteful number, since it uses less digits than its factorization.

25420766843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23774.

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 25420766843 in words is "twenty-five billion, four hundred twenty million, seven hundred sixty-six thousand, eight hundred forty-three".