726221773108 has 54 divisors (see below), whose sum is σ = 1392934763234. Its totient is φ = 329333772768.

The previous prime is 726221773003. The next prime is 726221773139. The reversal of 726221773108 is 801377122627.

It can be written as a sum of positive squares in only one way, i.e., 502768919844 + 223452853264 = 709062^2 + 472708^2 .

It is a super-2 number, since 2×726221773108² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 362566035 + ... + 362568037.

Almost surely, 2^726221773108 is an apocalyptic number.

It is an amenable number.

726221773108 is a deficient number, since it is larger than the sum of its proper divisors (666712990126).

726221773108 is an equidigital number, since it uses as much as digits as its factorization.

726221773108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141 (or 2077 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 726221773108 in words is "seven hundred twenty-six billion, two hundred twenty-one million, seven hundred seventy-three thousand, one hundred eight".