64464040406442 has 64 divisors (see below), whose sum is σ = 137220735168000. Its totient is φ = 20131734748608.

The previous prime is 64464040406429. The next prime is 64464040406449. The reversal of 64464040406442 is 24460404046446.

64464040406442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64464040406442² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64464040406391 and 64464040406400.

It is not an unprimeable number, because it can be changed into a prime (64464040406449) 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 in 31 ways as a sum of consecutive naturals, for example, 1539109 + ... + 11458487.

It is an arithmetic number, because the mean of its divisors is an integer number (2144073987000).

Almost surely, 2^{64464040406442} is an apocalyptic number.

64464040406442 is an abundant number, since it is smaller than the sum of its proper divisors (72756694761558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64464040406442 is a wasteful number, since it uses less digits than its factorization.

64464040406442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9920035.

The product of its (nonzero) digits is 7077888, while the sum is 48.

The spelling of 64464040406442 in words is "sixty-four trillion, four hundred sixty-four billion, forty million, four hundred six thousand, four hundred forty-two".