38403721551066 has 16 divisors (see below), whose sum is σ = 76810786756704. Its totient is φ = 12800683241264.

The previous prime is 38403721551007. The next prime is 38403721551071. The reversal of 38403721551066 is 66015512730483.

38403721551066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×38403721551066² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139169616 + ... + 139445291.

It is an arithmetic number, because the mean of its divisors is an integer number (4800674172294).

Almost surely, 2^{38403721551066} is an apocalyptic number.

38403721551066 is an abundant number, since it is smaller than the sum of its proper divisors (38407065205638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38403721551066 is a wasteful number, since it uses less digits than its factorization.

38403721551066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278637885.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 38403721551066 in words is "thirty-eight trillion, four hundred three billion, seven hundred twenty-one million, five hundred fifty-one thousand, sixty-six".