64431533513402 has 16 divisors (see below), whose sum is σ = 105496818066432. Its totient is φ = 29269449690720.

The previous prime is 64431533513393. The next prime is 64431533513491. The reversal of 64431533513402 is 20431533513446.

It is a happy number.

It is a super-2 number, since 2×64431533513402² (a number of 28 digits) contains 22 as substring.

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, 880512443 + ... + 880585614.

It is an arithmetic number, because the mean of its divisors is an integer number (6593551129152).

Almost surely, 2^{64431533513402} is an apocalyptic number.

64431533513402 is a deficient number, since it is larger than the sum of its proper divisors (41065284553030).

64431533513402 is a wasteful number, since it uses less digits than its factorization.

64431533513402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761099733.

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 64431533513402 its sum of digits (44), we get a palindrome (64431533513446).

The spelling of 64431533513402 in words is "sixty-four trillion, four hundred thirty-one billion, five hundred thirty-three million, five hundred thirteen thousand, four hundred two".