64393136342 has 4 divisors (see below), whose sum is σ = 96589704516. Its totient is φ = 32196568170.

The previous prime is 64393136323. The next prime is 64393136347. The reversal of 64393136342 is 24363139346.

It is a happy number.

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

It is a super-2 number, since 2×64393136342² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64393136293 and 64393136302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64393136347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16098284084 + ... + 16098284087.

It is an arithmetic number, because the mean of its divisors is an integer number (24147426129).

Almost surely, 2^64393136342 is an apocalyptic number.

64393136342 is a deficient number, since it is larger than the sum of its proper divisors (32196568174).

64393136342 is a wasteful number, since it uses less digits than its factorization.

64393136342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32196568173.

The product of its digits is 839808, while the sum is 44.

The spelling of 64393136342 in words is "sixty-four billion, three hundred ninety-three million, one hundred thirty-six thousand, three hundred forty-two".