7772200644 has 48 divisors (see below), whose sum is σ = 19539051840. Its totient is φ = 2390355840.

The previous prime is 7772200643. The next prime is 7772200661. The reversal of 7772200644 is 4460022777.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7772200643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373474 + ... + 393734.

It is an arithmetic number, because the mean of its divisors is an integer number (407063580).

Almost surely, 2^7772200644 is an apocalyptic number.

It is an amenable number.

7772200644 is an abundant number, since it is smaller than the sum of its proper divisors (11766851196).

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

7772200644 is a wasteful number, since it uses less digits than its factorization.

7772200644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22740 (or 22738 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 39.

The square root of 7772200644 is about 88160.0853221003. The cubic root of 7772200644 is about 1980.8336322366.

The spelling of 7772200644 in words is "seven billion, seven hundred seventy-two million, two hundred thousand, six hundred forty-four".