25661353 has 4 divisors (see below), whose sum is σ = 26777088. Its totient is φ = 24545620.

The previous prime is 25661351. The next prime is 25661369. The reversal of 25661353 is 35316652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25661353 - 2¹ = 25661351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25661351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557833 + ... + 557878.

It is an arithmetic number, because the mean of its divisors is an integer number (6694272).

Almost surely, 2^25661353 is an apocalyptic number.

25661353 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25661353 is a deficient number, since it is larger than the sum of its proper divisors (1115735).

25661353 is a wasteful number, since it uses less digits than its factorization.

25661353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115734.

The product of its digits is 16200, while the sum is 31.

The square root of 25661353 is about 5065.7036036468. The cubic root of 25661353 is about 294.9577762032.

The spelling of 25661353 in words is "twenty-five million, six hundred sixty-one thousand, three hundred fifty-three".