770780745 has 128 divisors (see below), whose sum is σ = 1641185280. Its totient is φ = 335819520.

The previous prime is 770780737. The next prime is 770780753. The reversal of 770780745 is 547087077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (770780737) and next prime (770780753).

It is not a de Polignac number, because 770780745 - 2³ = 770780737 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 770780745.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2431327 + ... + 2431643.

It is an arithmetic number, because the mean of its divisors is an integer number (12821760).

Almost surely, 2^770780745 is an apocalyptic number.

It is an amenable number.

770780745 is an abundant number, since it is smaller than the sum of its proper divisors (870404535).

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

770780745 is a wasteful number, since it uses less digits than its factorization.

770780745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 770780745 is about 27762.9383351258. The cubic root of 770780745 is about 916.8753260900.

The spelling of 770780745 in words is "seven hundred seventy million, seven hundred eighty thousand, seven hundred forty-five".