643054262534 has 16 divisors (see below), whose sum is σ = 1016298711600. Its totient is φ = 304319687904.

The previous prime is 643054262527. The next prime is 643054262537. The reversal of 643054262534 is 435262450346.

It is a super-2 number, since 2×643054262534² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643054262537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7874477 + ... + 7955720.

It is an arithmetic number, because the mean of its divisors is an integer number (63518669475).

Almost surely, 2^643054262534 is an apocalyptic number.

643054262534 is a deficient number, since it is larger than the sum of its proper divisors (373244449066).

643054262534 is a wasteful number, since it uses less digits than its factorization.

643054262534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15831287.

The product of its (nonzero) digits is 2073600, while the sum is 44.

The spelling of 643054262534 in words is "six hundred forty-three billion, fifty-four million, two hundred sixty-two thousand, five hundred thirty-four".