6406143772437 has 6 divisors (see below), whose sum is σ = 9253318782422. Its totient is φ = 4270762514952.

The previous prime is 6406143772429. The next prime is 6406143772453. The reversal of 6406143772437 is 7342773416046.

6406143772437 is a `hidden beast` number, since 6 + 40 + 61 + 43 + 7 + 72 + 437 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6278602649796 + 127541122641 = 2505714^2 + 357129^2 .

It is not a de Polignac number, because 6406143772437 - 2³ = 6406143772429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406143772337) 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 5 ways as a sum of consecutive naturals, for example, 355896876238 + ... + 355896876255.

Almost surely, 2^{6406143772437} is an apocalyptic number.

It is an amenable number.

6406143772437 is a deficient number, since it is larger than the sum of its proper divisors (2847175009985).

6406143772437 is a wasteful number, since it uses less digits than its factorization.

6406143772437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711793752499 (or 711793752496 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 54.

The spelling of 6406143772437 in words is "six trillion, four hundred six billion, one hundred forty-three million, seven hundred seventy-two thousand, four hundred thirty-seven".