25242742417 has 4 divisors (see below), whose sum is σ = 26727609636. Its totient is φ = 23757875200.

The previous prime is 25242742411. The next prime is 25242742453. The reversal of 25242742417 is 71424724252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15554080656 + 9688661761 = 124716^2 + 98431^2 .

It is a cyclic number.

It is not a de Polignac number, because 25242742417 - 2⁷ = 25242742289 is a prime.

It is a super-2 number, since 2×25242742417² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25242742417.

It is not an unprimeable number, because it can be changed into a prime (25242742411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742433584 + ... + 742433617.

It is an arithmetic number, because the mean of its divisors is an integer number (6681902409).

Almost surely, 2^25242742417 is an apocalyptic number.

It is an amenable number.

25242742417 is a deficient number, since it is larger than the sum of its proper divisors (1484867219).

25242742417 is a wasteful number, since it uses less digits than its factorization.

25242742417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484867218.

The product of its digits is 250880, while the sum is 40.

The spelling of 25242742417 in words is "twenty-five billion, two hundred forty-two million, seven hundred forty-two thousand, four hundred seventeen".