78578643082 has 4 divisors (see below), whose sum is σ = 117867964626. Its totient is φ = 39289321540.

The previous prime is 78578643079. The next prime is 78578643103. The reversal of 78578643082 is 28034687587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28034687587 = 19 ⋅1475509873.

It can be written as a sum of positive squares in only one way, i.e., 76236179881 + 2342463201 = 276109^2 + 48399^2 .

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, 19644660769 + ... + 19644660772.

Almost surely, 2^78578643082 is an apocalyptic number.

78578643082 is a deficient number, since it is larger than the sum of its proper divisors (39289321544).

78578643082 is a wasteful number, since it uses less digits than its factorization.

78578643082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39289321543.

The product of its (nonzero) digits is 18063360, while the sum is 58.

The spelling of 78578643082 in words is "seventy-eight billion, five hundred seventy-eight million, six hundred forty-three thousand, eighty-two".