38721078500072 has 16 divisors (see below), whose sum is σ = 72602088280740. Its totient is φ = 19360521625216.

The previous prime is 38721078500047. The next prime is 38721078500081. The reversal of 38721078500072 is 27000587012783.

It can be written as a sum of positive squares in 2 ways, for example, as 38573365876516 + 147712623556 = 6210746^2 + 384334^2 .

It is a super-3 number, since 3×38721078500072³ (a number of 42 digits) contains 333 as substring.

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, 15534638 + ... + 17854050.

Almost surely, 2^{38721078500072} is an apocalyptic number.

It is an amenable number.

38721078500072 is a deficient number, since it is larger than the sum of its proper divisors (33881009780668).

38721078500072 is a wasteful number, since it uses less digits than its factorization.

38721078500072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406212 (or 4406208 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 38721078500072 in words is "thirty-eight trillion, seven hundred twenty-one billion, seventy-eight million, five hundred thousand, seventy-two".