64142125823 has 4 divisors (see below), whose sum is σ = 66211226688. Its totient is φ = 62073024960.

The previous prime is 64142125819. The next prime is 64142125829. The reversal of 64142125823 is 32852124146.

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 64142125823 - 2² = 64142125819 is a prime.

It is a super-2 number, since 2×64142125823² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64142125829) 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, 1034550386 + ... + 1034550447.

It is an arithmetic number, because the mean of its divisors is an integer number (16552806672).

Almost surely, 2^64142125823 is an apocalyptic number.

64142125823 is a deficient number, since it is larger than the sum of its proper divisors (2069100865).

64142125823 is a wasteful number, since it uses less digits than its factorization.

64142125823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069100864.

The product of its digits is 92160, while the sum is 38.

Adding to 64142125823 its reverse (32852124146), we get a palindrome (96994249969).

The spelling of 64142125823 in words is "sixty-four billion, one hundred forty-two million, one hundred twenty-five thousand, eight hundred twenty-three".