25056516566 has 8 divisors (see below), whose sum is σ = 38007075960. Its totient is φ = 12387491248.

The previous prime is 25056516557. The next prime is 25056516593. The reversal of 25056516566 is 66561565052.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25056516566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70383296 + ... + 70383651.

It is an arithmetic number, because the mean of its divisors is an integer number (4750884495).

Almost surely, 2^25056516566 is an apocalyptic number.

25056516566 is a deficient number, since it is larger than the sum of its proper divisors (12950559394).

25056516566 is a wasteful number, since it uses less digits than its factorization.

25056516566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140767038.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 25056516566 in words is "twenty-five billion, fifty-six million, five hundred sixteen thousand, five hundred sixty-six".