25661622 has 32 divisors (see below), whose sum is σ = 59185152. Its totient is φ = 7265664.

The previous prime is 25661611. The next prime is 25661639. The reversal of 25661622 is 22616652.

It is a self number, because there is not a number n which added to its sum of digits gives 25661622.

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, 2043 + ... + 7449.

It is an arithmetic number, because the mean of its divisors is an integer number (1849536).

Almost surely, 2^25661622 is an apocalyptic number.

25661622 is an abundant number, since it is smaller than the sum of its proper divisors (33523530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25661622 is a wasteful number, since it uses less digits than its factorization.

25661622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532.

The product of its digits is 8640, while the sum is 30.

The square root of 25661622 is about 5065.7301546766. The cubic root of 25661622 is about 294.9588068499.

The spelling of 25661622 in words is "twenty-five million, six hundred sixty-one thousand, six hundred twenty-two".