721119486877 has 2 divisors, whose sum is σ = 721119486878. Its totient is φ = 721119486876.

The previous prime is 721119486853. The next prime is 721119486883. The reversal of 721119486877 is 778684911127.

721119486877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395422138276 + 325697348601 = 628826^2 + 570699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721119486877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721119486977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360559743438 + 360559743439.

It is an arithmetic number, because the mean of its divisors is an integer number (360559743439).

Almost surely, 2^721119486877 is an apocalyptic number.

It is an amenable number.

721119486877 is a deficient number, since it is larger than the sum of its proper divisors (1).

721119486877 is an equidigital number, since it uses as much as digits as its factorization.

721119486877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 61.

The spelling of 721119486877 in words is "seven hundred twenty-one billion, one hundred nineteen million, four hundred eighty-six thousand, eight hundred seventy-seven".