25716977 has 12 divisors (see below), whose sum is σ = 30443700. Its totient is φ = 21579360.

The previous prime is 25716973. The next prime is 25716983. The reversal of 25716977 is 77961752.

It can be written as a sum of positive squares in 2 ways, for example, as 3964081 + 21752896 = 1991^2 + 4664^2 .

It is not a de Polignac number, because 25716977 - 2² = 25716973 is a prime.

It is a super-2 number, since 2×25716977² = 1322725812037058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25716973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6602 + ... + 9747.

It is an arithmetic number, because the mean of its divisors is an integer number (2536975).

Almost surely, 2^25716977 is an apocalyptic number.

It is an amenable number.

25716977 is a deficient number, since it is larger than the sum of its proper divisors (4726723).

25716977 is a wasteful number, since it uses less digits than its factorization.

25716977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16384 (or 16373 counting only the distinct ones).

The product of its digits is 185220, while the sum is 44.

The square root of 25716977 is about 5071.1908857782. The cubic root of 25716977 is about 295.1707409560.

The spelling of 25716977 in words is "twenty-five million, seven hundred sixteen thousand, nine hundred seventy-seven".