775375477643 has 4 divisors (see below), whose sum is σ = 835019745168. Its totient is φ = 715731210120.

The previous prime is 775375477633. The next prime is 775375477663. The reversal of 775375477643 is 346774573577.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 775375477643 - 2²² = 775371283339 is a prime.

It is a super-2 number, since 2×775375477643² (a number of 25 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 775375477643.

It is not an unprimeable number, because it can be changed into a prime (775375477633) 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, 29822133743 + ... + 29822133768.

It is an arithmetic number, because the mean of its divisors is an integer number (208754936292).

Almost surely, 2^775375477643 is an apocalyptic number.

775375477643 is a deficient number, since it is larger than the sum of its proper divisors (59644267525).

775375477643 is a wasteful number, since it uses less digits than its factorization.

775375477643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59644267524.

The product of its digits is 363031200, while the sum is 65.

The spelling of 775375477643 in words is "seven hundred seventy-five billion, three hundred seventy-five million, four hundred seventy-seven thousand, six hundred forty-three".