64431533513446 has 16 divisors (see below), whose sum is σ = 105433672638528. Its totient is φ = 29286990087400.

The previous prime is 64431533513393. The next prime is 64431533513491.

64431533513446 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64431533513393 and 64431533513402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6427821 + ... + 13045303.

It is an arithmetic number, because the mean of its divisors is an integer number (6589604539908).

Almost surely, 2^{64431533513446} is an apocalyptic number.

64431533513446 is a deficient number, since it is larger than the sum of its proper divisors (41002139125082).

64431533513446 is a wasteful number, since it uses less digits than its factorization.

64431533513446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7060067.

The product of its digits is 18662400, while the sum is 52.

It can be divided in two parts, 6443153 and 3513446, that added together give a palindrome (9956599).

The spelling of 64431533513446 in words is "sixty-four trillion, four hundred thirty-one billion, five hundred thirty-three million, five hundred thirteen thousand, four hundred forty-six".