7720444556 has 12 divisors (see below), whose sum is σ = 14739030600. Its totient is φ = 3509292960.

The previous prime is 7720444513. The next prime is 7720444559. The reversal of 7720444556 is 6554440277.

It is a happy number.

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: 175464649 = 7720444556 / (7 + 7 + 2 + 0 + 4 + 4 + 4 + 5 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (7720444559) 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, 87732281 + ... + 87732368.

It is an arithmetic number, because the mean of its divisors is an integer number (1228252550).

Almost surely, 2^7720444556 is an apocalyptic number.

It is an amenable number.

7720444556 is a deficient number, since it is larger than the sum of its proper divisors (7018586044).

7720444556 is a wasteful number, since it uses less digits than its factorization.

7720444556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175464664 (or 175464662 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 44.

The square root of 7720444556 is about 87866.0603191016. The cubic root of 7720444556 is about 1976.4269605096.

The spelling of 7720444556 in words is "seven billion, seven hundred twenty million, four hundred forty-four thousand, five hundred fifty-six".