643077631753 has 4 divisors (see below), whose sum is σ = 643315899600. Its totient is φ = 642839363908.

The previous prime is 643077631751. The next prime is 643077631787. The reversal of 643077631753 is 357136770346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 643077631753 - 2¹ = 643077631751 is a prime.

It is a super-2 number, since 2×643077631753² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643077631753.

It is not an unprimeable number, because it can be changed into a prime (643077631751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119129875 + ... + 119135272.

It is an arithmetic number, because the mean of its divisors is an integer number (160828974900).

Almost surely, 2^643077631753 is an apocalyptic number.

It is an amenable number.

643077631753 is a deficient number, since it is larger than the sum of its proper divisors (238267847).

643077631753 is a wasteful number, since it uses less digits than its factorization.

643077631753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238267846.

The product of its (nonzero) digits is 6667920, while the sum is 52.

The spelling of 643077631753 in words is "six hundred forty-three billion, seventy-seven million, six hundred thirty-one thousand, seven hundred fifty-three".