25347661919 has 2 divisors, whose sum is σ = 25347661920. Its totient is φ = 25347661918.

The previous prime is 25347661897. The next prime is 25347661931. The reversal of 25347661919 is 91916674352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25347661919 - 2⁸ = 25347661663 is a prime.

It is a super-2 number, since 2×25347661919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25347661519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12673830959 + 12673830960.

It is an arithmetic number, because the mean of its divisors is an integer number (12673830960).

Almost surely, 2^25347661919 is an apocalyptic number.

25347661919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25347661919 is an equidigital number, since it uses as much as digits as its factorization.

25347661919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The spelling of 25347661919 in words is "twenty-five billion, three hundred forty-seven million, six hundred sixty-one thousand, nine hundred nineteen".