25541778 has 8 divisors (see below), whose sum is σ = 51083568. Its totient is φ = 8513924.

The previous prime is 25541777. The next prime is 25541809. The reversal of 25541778 is 87714552.

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

25541778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25541777) 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, 2128476 + ... + 2128487.

It is an arithmetic number, because the mean of its divisors is an integer number (6385446).

Almost surely, 2^25541778 is an apocalyptic number.

25541778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25541778 is a wasteful number, since it uses less digits than its factorization.

25541778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256968.

The product of its digits is 78400, while the sum is 39.

The square root of 25541778 is about 5053.8874146542. The cubic root of 25541778 is about 294.4989214604.

The spelling of 25541778 in words is "twenty-five million, five hundred forty-one thousand, seven hundred seventy-eight".