65426441391 has 32 divisors (see below), whose sum is σ = 97565457600. Its totient is φ = 43331742720.

The previous prime is 65426441389. The next prime is 65426441429. The reversal of 65426441391 is 19314462456.

65426441391 is a `hidden beast` number, since 6 + 542 + 6 + 4 + 4 + 13 + 91 = 666.

It is not a de Polignac number, because 65426441391 - 2¹ = 65426441389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65426441351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2544025 + ... + 2569613.

It is an arithmetic number, because the mean of its divisors is an integer number (3048920550).

Almost surely, 2^65426441391 is an apocalyptic number.

65426441391 is a deficient number, since it is larger than the sum of its proper divisors (32139016209).

65426441391 is a wasteful number, since it uses less digits than its factorization.

65426441391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26216 (or 26210 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 65426441391 in words is "sixty-five billion, four hundred twenty-six million, four hundred forty-one thousand, three hundred ninety-one".