755768643 has 64 divisors (see below), whose sum is σ = 1303511040. Its totient is φ = 379095552.

The previous prime is 755768639. The next prime is 755768693. The reversal of 755768643 is 346867557.

It is not a de Polignac number, because 755768643 - 2² = 755768639 is a prime.

It is a super-2 number, since 2×755768643² = 1142372483484122898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (755768693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 453630 + ... + 455292.

It is an arithmetic number, because the mean of its divisors is an integer number (20367360).

Almost surely, 2^755768643 is an apocalyptic number.

755768643 is a deficient number, since it is larger than the sum of its proper divisors (547742397).

755768643 is a wasteful number, since it uses less digits than its factorization.

755768643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its digits is 4233600, while the sum is 51.

The square root of 755768643 is about 27491.2466614375. The cubic root of 755768643 is about 910.8837540241.

The spelling of 755768643 in words is "seven hundred fifty-five million, seven hundred sixty-eight thousand, six hundred forty-three".