100721716234448 has 20 divisors (see below), whose sum is σ = 195153636646500. Its totient is φ = 50359487422464.

The previous prime is 100721716234439. The next prime is 100721716234453. The reversal of 100721716234448 is 844432617127001.

It can be written as a sum of positive squares in 2 ways, for example, as 46702626580624 + 54019089653824 = 6833932^2 + 7349768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100721716234396 and 100721716234405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85062065 + ... + 86238032.

It is an arithmetic number, because the mean of its divisors is an integer number (9757681832325).

Almost surely, 2^{100721716234448} is an apocalyptic number.

It is an amenable number.

100721716234448 is a deficient number, since it is larger than the sum of its proper divisors (94431920412052).

100721716234448 is a wasteful number, since it uses less digits than its factorization.

100721716234448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171336854 (or 171336848 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 100721716234448 in words is "one hundred trillion, seven hundred twenty-one billion, seven hundred sixteen million, two hundred thirty-four thousand, four hundred forty-eight".