25783563 has 8 divisors (see below), whose sum is σ = 37022608. Its totient is φ = 15866784.

The previous prime is 25783553. The next prime is 25783573. The reversal of 25783563 is 36538752.

It is an interprime number because it is at equal distance from previous prime (25783553) and next prime (25783573).

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

It is a de Polignac number, because none of the positive numbers 2^k-25783563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 661117 = 25783563 / (2 + 5 + 7 + 8 + 3 + 5 + 6 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25783553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330520 + ... + 330597.

It is an arithmetic number, because the mean of its divisors is an integer number (4627826).

Almost surely, 2^25783563 is an apocalyptic number.

25783563 is a deficient number, since it is larger than the sum of its proper divisors (11239045).

25783563 is a wasteful number, since it uses less digits than its factorization.

25783563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661133.

The product of its digits is 151200, while the sum is 39.

The square root of 25783563 is about 5077.7517662840. The cubic root of 25783563 is about 295.4252719155.

The spelling of 25783563 in words is "twenty-five million, seven hundred eighty-three thousand, five hundred sixty-three".