77445764 has 12 divisors (see below), whose sum is σ = 147851088. Its totient is φ = 35202600.

The previous prime is 77445763. The next prime is 77445791. The reversal of 77445764 is 46754477.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1760131 = 77445764 / (7 + 7 + 4 + 4 + 5 + 7 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (77445763) 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 3 ways as a sum of consecutive naturals, for example, 880022 + ... + 880109.

It is an arithmetic number, because the mean of its divisors is an integer number (12320924).

Almost surely, 2^77445764 is an apocalyptic number.

It is an amenable number.

77445764 is a deficient number, since it is larger than the sum of its proper divisors (70405324).

77445764 is a wasteful number, since it uses less digits than its factorization.

77445764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760146 (or 1760144 counting only the distinct ones).

The product of its digits is 658560, while the sum is 44.

The square root of 77445764 is about 8800.3274939061. The cubic root of 77445764 is about 426.2514697392.

The spelling of 77445764 in words is "seventy-seven million, four hundred forty-five thousand, seven hundred sixty-four".