25347543149 has 2 divisors, whose sum is σ = 25347543150. Its totient is φ = 25347543148.

The previous prime is 25347543107. The next prime is 25347543181. The reversal of 25347543149 is 94134574352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22667410249 + 2680132900 = 150557^2 + 51770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25347543149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25347533149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12673771574 + 12673771575.

It is an arithmetic number, because the mean of its divisors is an integer number (12673771575).

Almost surely, 2^25347543149 is an apocalyptic number.

It is an amenable number.

25347543149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25347543149 is an equidigital number, since it uses as much as digits as its factorization.

25347543149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 47.

The spelling of 25347543149 in words is "twenty-five billion, three hundred forty-seven million, five hundred forty-three thousand, one hundred forty-nine".