721136337676 has 12 divisors (see below), whose sum is σ = 1316857660272. Its totient is φ = 344891291888.

The previous prime is 721136337671. The next prime is 721136337689. The reversal of 721136337676 is 676733631127.

It is not an unprimeable number, because it can be changed into a prime (721136337671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3919219135 + ... + 3919219318.

It is an arithmetic number, because the mean of its divisors is an integer number (109738138356).

Almost surely, 2^721136337676 is an apocalyptic number.

It is an amenable number.

721136337676 is a deficient number, since it is larger than the sum of its proper divisors (595721322596).

721136337676 is a wasteful number, since it uses less digits than its factorization.

721136337676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7838438480 (or 7838438478 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 52.

The spelling of 721136337676 in words is "seven hundred twenty-one billion, one hundred thirty-six million, three hundred thirty-seven thousand, six hundred seventy-six".