78324977956 has 27 divisors (see below), whose sum is σ = 140534566963. Its totient is φ = 38196111680.

The previous prime is 78324977923. The next prime is 78324977963. The reversal of 78324977956 is 65977942387.

The square root of 78324977956 is 279866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 27984100 + 78296993856 = 5290^2 + 279816^2 .

It is a super-2 number, since 2×78324977956² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

Its product of digits (160030080) is a multiple of the sum of its prime divisors (3456).

It is a junction number, because it is equal to n+sod(n) for n = 78324977891 and 78324977900.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 22947306 + ... + 22950718.

Almost surely, 2^78324977956 is an apocalyptic number.

78324977956 is the 279866-th square number.

It is an amenable number.

78324977956 is a deficient number, since it is larger than the sum of its proper divisors (62209589007).

78324977956 is an frugal number, since it uses more digits than its factorization.

78324977956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912 (or 3456 counting only the distinct ones).

The product of its digits is 160030080, while the sum is 67.

The spelling of 78324977956 in words is "seventy-eight billion, three hundred twenty-four million, nine hundred seventy-seven thousand, nine hundred fifty-six".