721136337674 has 4 divisors (see below), whose sum is σ = 1081704506514. Its totient is φ = 360568168836.

The previous prime is 721136337671. The next prime is 721136337689. The reversal of 721136337674 is 476733631127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 690133932049 + 31002405625 = 830743^2 + 176075^2 .

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 as a sum of consecutive naturals, namely, 180284084417 + ... + 180284084420.

Almost surely, 2^721136337674 is an apocalyptic number.

721136337674 is a deficient number, since it is larger than the sum of its proper divisors (360568168840).

721136337674 is a wasteful number, since it uses less digits than its factorization.

721136337674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360568168839.

The product of its digits is 2667168, while the sum is 50.

The spelling of 721136337674 in words is "seven hundred twenty-one billion, one hundred thirty-six million, three hundred thirty-seven thousand, six hundred seventy-four".