721678085396 has 12 divisors (see below), whose sum is σ = 1280724490080. Its totient is φ = 355756802520.

The previous prime is 721678085281. The next prime is 721678085399. The reversal of 721678085396 is 693580876127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721678085399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270559726 + ... + 1270560293.

It is an arithmetic number, because the mean of its divisors is an integer number (106727040840).

Almost surely, 2^721678085396 is an apocalyptic number.

It is an amenable number.

721678085396 is a deficient number, since it is larger than the sum of its proper divisors (559046404684).

721678085396 is a wasteful number, since it uses less digits than its factorization.

721678085396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541120094 (or 2541120092 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 721678085396 in words is "seven hundred twenty-one billion, six hundred seventy-eight million, eighty-five thousand, three hundred ninety-six".