767216321642 has 4 divisors (see below), whose sum is σ = 1150824482466. Its totient is φ = 383608160820.

The previous prime is 767216321639. The next prime is 767216321681. The reversal of 767216321642 is 246123612767.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246123612767 = 1069 ⋅230237243.

It can be written as a sum of positive squares in only one way, i.e., 764244872521 + 2971449121 = 874211^2 + 54511^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191804080409 + ... + 191804080412.

Almost surely, 2^767216321642 is an apocalyptic number.

767216321642 is a deficient number, since it is larger than the sum of its proper divisors (383608160824).

767216321642 is a wasteful number, since it uses less digits than its factorization.

767216321642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383608160823.

The product of its digits is 1016064, while the sum is 47.

The spelling of 767216321642 in words is "seven hundred sixty-seven billion, two hundred sixteen million, three hundred twenty-one thousand, six hundred forty-two".