74278159664 has 10 divisors (see below), whose sum is σ = 143913934380. Its totient is φ = 37139079824.

The previous prime is 74278159609. The next prime is 74278159691. The reversal of 74278159664 is 46695187247.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2321192474 + ... + 2321192505.

It is an arithmetic number, because the mean of its divisors is an integer number (14391393438).

Almost surely, 2^74278159664 is an apocalyptic number.

It is an amenable number.

74278159664 is a deficient number, since it is larger than the sum of its proper divisors (69635774716).

74278159664 is a wasteful number, since it uses less digits than its factorization.

74278159664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642384987 (or 4642384981 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 59.

The spelling of 74278159664 in words is "seventy-four billion, two hundred seventy-eight million, one hundred fifty-nine thousand, six hundred sixty-four".