721544006743706 has 16 divisors (see below), whose sum is σ = 1101084823454400. Its totient is φ = 354520448638848.

The previous prime is 721544006743597. The next prime is 721544006743711. The reversal of 721544006743706 is 607347600445127.

It is a super-2 number, since 2×721544006743706² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178787686 + ... + 1179399633.

It is an arithmetic number, because the mean of its divisors is an integer number (68817801465900).

Almost surely, 2^{721544006743706} is an apocalyptic number.

721544006743706 is a deficient number, since it is larger than the sum of its proper divisors (379540816710694).

721544006743706 is a wasteful number, since it uses less digits than its factorization.

721544006743706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358189973.

The product of its (nonzero) digits is 23708160, while the sum is 56.

The spelling of 721544006743706 in words is "seven hundred twenty-one trillion, five hundred forty-four billion, six million, seven hundred forty-three thousand, seven hundred six".