25437384403 has 2 divisors, whose sum is σ = 25437384404. Its totient is φ = 25437384402.

The previous prime is 25437384383. The next prime is 25437384409. The reversal of 25437384403 is 30448373452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25437384403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25437384403.

It is not a weakly prime, because it can be changed into another prime (25437384409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12718692201 + 12718692202.

It is an arithmetic number, because the mean of its divisors is an integer number (12718692202).

Almost surely, 2^25437384403 is an apocalyptic number.

25437384403 is a deficient number, since it is larger than the sum of its proper divisors (1).

25437384403 is an equidigital number, since it uses as much as digits as its factorization.

25437384403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 43.

The spelling of 25437384403 in words is "twenty-five billion, four hundred thirty-seven million, three hundred eighty-four thousand, four hundred three".