770805945 has 96 divisors (see below), whose sum is σ = 1684859904. Its totient is φ = 317260800.

The previous prime is 770805911. The next prime is 770805947. The reversal of 770805945 is 549508077.

It is not a de Polignac number, because 770805945 - 2⁶ = 770805881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Together with 914053959 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 770805945.

It is not an unprimeable number, because it can be changed into a prime (770805947) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 165600 + ... + 170190.

It is an arithmetic number, because the mean of its divisors is an integer number (17550624).

Almost surely, 2^770805945 is an apocalyptic number.

It is an amenable number.

770805945 is an abundant number, since it is smaller than the sum of its proper divisors (914053959).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

770805945 is a wasteful number, since it uses less digits than its factorization.

770805945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663 (or 4660 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 770805945 is about 27763.3921738681. The cubic root of 770805945 is about 916.8853181258.

The spelling of 770805945 in words is "seven hundred seventy million, eight hundred five thousand, nine hundred forty-five".