25679281748401 has 4 divisors (see below), whose sum is σ = 26100253580404. Its totient is φ = 25258309916400.

The previous prime is 25679281748387. The next prime is 25679281748411. The reversal of 25679281748401 is 10484718297652.

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 446592812176 + 25232688936225 = 668276^2 + 5023215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25679281748401 - 2⁷ = 25679281748273 is a prime.

It is a super-2 number, since 2×25679281748401² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25679281748411) 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, 210485915910 + ... + 210485916031.

It is an arithmetic number, because the mean of its divisors is an integer number (6525063395101).

Almost surely, 2^{25679281748401} is an apocalyptic number.

It is an amenable number.

25679281748401 is a deficient number, since it is larger than the sum of its proper divisors (420971832003).

25679281748401 is an equidigital number, since it uses as much as digits as its factorization.

25679281748401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420971832002.

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 25679281748401 in words is "twenty-five trillion, six hundred seventy-nine billion, two hundred eighty-one million, seven hundred forty-eight thousand, four hundred one".