25778045 has 8 divisors (see below), whose sum is σ = 31095096. Its totient is φ = 20514816.

The previous prime is 25778029. The next prime is 25778047. The reversal of 25778045 is 54087752.

It can be written as a sum of positive squares in 4 ways, for example, as 6046681 + 19731364 = 2459^2 + 4442^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25778045 - 2⁴ = 25778029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778047) 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, 12392 + ... + 14321.

It is an arithmetic number, because the mean of its divisors is an integer number (3886887).

Almost surely, 2^25778045 is an apocalyptic number.

It is an amenable number.

25778045 is a deficient number, since it is larger than the sum of its proper divisors (5317051).

25778045 is a wasteful number, since it uses less digits than its factorization.

25778045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26911.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 25778045 is about 5077.2083865053. The cubic root of 25778045 is about 295.4041955298.

The spelling of 25778045 in words is "twenty-five million, seven hundred seventy-eight thousand, forty-five".