25726466387 has 4 divisors (see below), whose sum is σ = 26088811056. Its totient is φ = 25364121720.

The previous prime is 25726466371. The next prime is 25726466429. The reversal of 25726466387 is 78366462752.

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

It is a cyclic number.

It is not a de Polignac number, because 25726466387 - 2⁴ = 25726466371 is a prime.

It is a super-2 number, since 2×25726466387² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25726466587) 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, 181172228 + ... + 181172369.

It is an arithmetic number, because the mean of its divisors is an integer number (6522202764).

Almost surely, 2^25726466387 is an apocalyptic number.

25726466387 is a deficient number, since it is larger than the sum of its proper divisors (362344669).

25726466387 is an equidigital number, since it uses as much as digits as its factorization.

25726466387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362344668.

The product of its digits is 20321280, while the sum is 56.

The spelling of 25726466387 in words is "twenty-five billion, seven hundred twenty-six million, four hundred sixty-six thousand, three hundred eighty-seven".