64046446042 has 4 divisors (see below), whose sum is σ = 96069669066. Its totient is φ = 32023223020.

The previous prime is 64046445989. The next prime is 64046446043. The reversal of 64046446042 is 24064464046.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 37815080521 + 26231365521 = 194461^2 + 161961^2 .

It is a super-2 number, since 2×64046446042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64046445986 and 64046446004.

It is not an unprimeable number, because it can be changed into a prime (64046446043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16011611509 + ... + 16011611512.

Almost surely, 2^64046446042 is an apocalyptic number.

64046446042 is a deficient number, since it is larger than the sum of its proper divisors (32023223024).

64046446042 is a wasteful number, since it uses less digits than its factorization.

64046446042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32023223023.

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 64046446042 in words is "sixty-four billion, forty-six million, four hundred forty-six thousand, forty-two".