767873520221 has 48 divisors (see below), whose sum is σ = 840772258560. Its totient is φ = 701194155200.

The previous prime is 767873520151. The next prime is 767873520229. The reversal of 767873520221 is 122025378767.

It is a de Polignac number, because none of the positive numbers 2^k-767873520221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 767873520221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (767873520229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1033476776 + ... + 1033477518.

It is an arithmetic number, because the mean of its divisors is an integer number (17516088720).

Almost surely, 2^767873520221 is an apocalyptic number.

It is an amenable number.

767873520221 is a deficient number, since it is larger than the sum of its proper divisors (72898738339).

767873520221 is an equidigital number, since it uses as much as digits as its factorization.

767873520221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 50.

Adding to 767873520221 its reverse (122025378767), we get a palindrome (889898898988).

The spelling of 767873520221 in words is "seven hundred sixty-seven billion, eight hundred seventy-three million, five hundred twenty thousand, two hundred twenty-one".