7720447746 has 32 divisors (see below), whose sum is σ = 16867888128. Its totient is φ = 2336297040.

The previous prime is 7720447733. The next prime is 7720447751. The reversal of 7720447746 is 6477440277.

It is a junction number, because it is equal to n+sod(n) for n = 7720447695 and 7720447704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32470 + ... + 128433.

It is an arithmetic number, because the mean of its divisors is an integer number (527121504).

Almost surely, 2^7720447746 is an apocalyptic number.

7720447746 is an abundant number, since it is smaller than the sum of its proper divisors (9147440382).

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

7720447746 is a wasteful number, since it uses less digits than its factorization.

7720447746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161646.

The product of its (nonzero) digits is 1843968, while the sum is 48.

The square root of 7720447746 is about 87866.0784717288. The cubic root of 7720447746 is about 1976.4272327219.

The spelling of 7720447746 in words is "seven billion, seven hundred twenty million, four hundred forty-seven thousand, seven hundred forty-six".