6406143772438 has 32 divisors (see below), whose sum is σ = 10617732854784. Its totient is φ = 2883339119232.

The previous prime is 6406143772429. The next prime is 6406143772453. The reversal of 6406143772438 is 8342773416046.

It is a super-3 number, since 3×6406143772438³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9032131 + ... + 9715537.

It is an arithmetic number, because the mean of its divisors is an integer number (331804151712).

Almost surely, 2^{6406143772438} is an apocalyptic number.

6406143772438 is a deficient number, since it is larger than the sum of its proper divisors (4211589082346).

6406143772438 is a wasteful number, since it uses less digits than its factorization.

6406143772438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695436.

The product of its (nonzero) digits is 16257024, while the sum is 55.

The spelling of 6406143772438 in words is "six trillion, four hundred six billion, one hundred forty-three million, seven hundred seventy-two thousand, four hundred thirty-eight".