25407619091 has 2 divisors, whose sum is σ = 25407619092. Its totient is φ = 25407619090.

The previous prime is 25407619087. The next prime is 25407619103. The reversal of 25407619091 is 19091670452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25407619091 - 2² = 25407619087 is a prime.

It is not a weakly prime, because it can be changed into another prime (25407619031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12703809545 + 12703809546.

It is an arithmetic number, because the mean of its divisors is an integer number (12703809546).

Almost surely, 2^25407619091 is an apocalyptic number.

25407619091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25407619091 is an equidigital number, since it uses as much as digits as its factorization.

25407619091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 25407619091 in words is "twenty-five billion, four hundred seven million, six hundred nineteen thousand, ninety-one".