25530087605 has 16 divisors (see below), whose sum is σ = 33661656000. Its totient is φ = 18433752960.

The previous prime is 25530087593. The next prime is 25530087617. The reversal of 25530087605 is 50678003552.

It is an interprime number because it is at equal distance from previous prime (25530087593) and next prime (25530087617).

It is not a de Polignac number, because 25530087605 - 2⁴ = 25530087589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1662080 + ... + 1677369.

It is an arithmetic number, because the mean of its divisors is an integer number (2103853500).

Almost surely, 2^25530087605 is an apocalyptic number.

It is an amenable number.

25530087605 is a deficient number, since it is larger than the sum of its proper divisors (8131568395).

25530087605 is a wasteful number, since it uses less digits than its factorization.

25530087605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339604.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 25530087605 in words is "twenty-five billion, five hundred thirty million, eighty-seven thousand, six hundred five".