7720654540 has 12 divisors (see below), whose sum is σ = 16213374576. Its totient is φ = 3088261808.

The previous prime is 7720654519. The next prime is 7720654573. The reversal of 7720654540 is 454560277.

It is a super-2 number, since 2×7720654540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7720654493 and 7720654502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193016344 + ... + 193016383.

It is an arithmetic number, because the mean of its divisors is an integer number (1351114548).

Almost surely, 2^7720654540 is an apocalyptic number.

It is an amenable number.

7720654540 is an abundant number, since it is smaller than the sum of its proper divisors (8492720036).

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

7720654540 is a wasteful number, since it uses less digits than its factorization.

7720654540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386032736 (or 386032734 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The square root of 7720654540 is about 87867.2552205883. The cubic root of 7720654540 is about 1976.4448789197. Note that the first 3 decimals are identical.

The spelling of 7720654540 in words is "seven billion, seven hundred twenty million, six hundred fifty-four thousand, five hundred forty".