7977809282 has 4 divisors (see below), whose sum is σ = 11966713926. Its totient is φ = 3988904640.

The previous prime is 7977809267. The next prime is 7977809291. The reversal of 7977809282 is 2829087797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4203058561 + 3774750721 = 64831^2 + 61439^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1994452319 + ... + 1994452322.

Almost surely, 2^7977809282 is an apocalyptic number.

7977809282 is a deficient number, since it is larger than the sum of its proper divisors (3988904644).

7977809282 is a wasteful number, since it uses less digits than its factorization.

7977809282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988904643.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The square root of 7977809282 is about 89318.5830720573. The cubic root of 7977809282 is about 1998.1490610409.

The spelling of 7977809282 in words is "seven billion, nine hundred seventy-seven million, eight hundred nine thousand, two hundred eighty-two".