25715272167401 has 4 divisors (see below), whose sum is σ = 25980378066132. Its totient is φ = 25450166268672.

The previous prime is 25715272167379. The next prime is 25715272167443. The reversal of 25715272167401 is 10476127251752.

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 21371065723225 + 4344206444176 = 4622885^2 + 2084276^2 .

It is a cyclic number.

It is not a de Polignac number, because 25715272167401 - 2¹⁴ = 25715272151017 is a prime.

It is a super-2 number, since 2×25715272167401² (a number of 28 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 25715272167401.

It is not an unprimeable number, because it can be changed into a prime (25715272161401) 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, 132552949220 + ... + 132552949413.

It is an arithmetic number, because the mean of its divisors is an integer number (6495094516533).

Almost surely, 2^{25715272167401} is an apocalyptic number.

It is an amenable number.

25715272167401 is a deficient number, since it is larger than the sum of its proper divisors (265105898731).

25715272167401 is an equidigital number, since it uses as much as digits as its factorization.

25715272167401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265105898730.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 25715272167401 in words is "twenty-five trillion, seven hundred fifteen billion, two hundred seventy-two million, one hundred sixty-seven thousand, four hundred one".