425427138887 has 4 divisors (see below), whose sum is σ = 425459413176. Its totient is φ = 425394864600.

The previous prime is 425427138833. The next prime is 425427138901. The reversal of 425427138887 is 788831724524.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425427138887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425427138287) 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, 16117364 + ... + 16143737.

It is an arithmetic number, because the mean of its divisors is an integer number (106364853294).

Almost surely, 2^425427138887 is an apocalyptic number.

425427138887 is a deficient number, since it is larger than the sum of its proper divisors (32274289).

425427138887 is a wasteful number, since it uses less digits than its factorization.

425427138887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274288.

The product of its digits is 24084480, while the sum is 59.

The spelling of 425427138887 in words is "four hundred twenty-five billion, four hundred twenty-seven million, one hundred thirty-eight thousand, eight hundred eighty-seven".