25193345587 has 2 divisors, whose sum is σ = 25193345588. Its totient is φ = 25193345586.

The previous prime is 25193345581. The next prime is 25193345627. The reversal of 25193345587 is 78554339152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25193345587 - 2²⁷ = 25059127859 is a prime.

It is not a weakly prime, because it can be changed into another prime (25193345581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12596672793 + 12596672794.

It is an arithmetic number, because the mean of its divisors is an integer number (12596672794).

Almost surely, 2^25193345587 is an apocalyptic number.

25193345587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25193345587 is an equidigital number, since it uses as much as digits as its factorization.

25193345587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 52.

It can be divided in two parts, 2519334 and 5587, that added together give a square (2524921 = 1589²).

The spelling of 25193345587 in words is "twenty-five billion, one hundred ninety-three million, three hundred forty-five thousand, five hundred eighty-seven".