721253078714 has 12 divisors (see below), whose sum is σ = 1258513025274. Its totient is φ = 309108462264.

The previous prime is 721253078699. The next prime is 721253078719. The reversal of 721253078714 is 417870352127.

It can be written as a sum of positive squares in only one way, i.e., 634738857025 + 86514221689 = 796705^2 + 294133^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (721253078719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3679862549 + ... + 3679862744.

Almost surely, 2^721253078714 is an apocalyptic number.

721253078714 is a deficient number, since it is larger than the sum of its proper divisors (537259946560).

721253078714 is a wasteful number, since it uses less digits than its factorization.

721253078714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7359725309 (or 7359725302 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 721253078714 in words is "seven hundred twenty-one billion, two hundred fifty-three million, seventy-eight thousand, seven hundred fourteen".