25815250645 has 8 divisors (see below), whose sum is σ = 31067577504. Its totient is φ = 20592682704.

The previous prime is 25815250631. The next prime is 25815250663. The reversal of 25815250645 is 54605251852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25815250645 - 2¹⁵ = 25815217877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7437819 + ... + 7441288.

It is an arithmetic number, because the mean of its divisors is an integer number (3883447188).

Almost surely, 2^25815250645 is an apocalyptic number.

It is an amenable number.

25815250645 is a deficient number, since it is larger than the sum of its proper divisors (5252326859).

25815250645 is a wasteful number, since it uses less digits than its factorization.

25815250645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879459.

The product of its (nonzero) digits is 480000, while the sum is 43.

The spelling of 25815250645 in words is "twenty-five billion, eight hundred fifteen million, two hundred fifty thousand, six hundred forty-five".