38721132605447 has 2 divisors, whose sum is σ = 38721132605448. Its totient is φ = 38721132605446.

The previous prime is 38721132605417. The next prime is 38721132605473. The reversal of 38721132605447 is 74450623112783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38721132605447 - 2⁸ = 38721132605191 is a prime.

It is a super-2 number, since 2×38721132605447² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38721132605417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360566302723 + 19360566302724.

It is an arithmetic number, because the mean of its divisors is an integer number (19360566302724).

Almost surely, 2^{38721132605447} is an apocalyptic number.

38721132605447 is a deficient number, since it is larger than the sum of its proper divisors (1).

38721132605447 is an equidigital number, since it uses as much as digits as its factorization.

38721132605447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 38721132605447 in words is "thirty-eight trillion, seven hundred twenty-one billion, one hundred thirty-two million, six hundred five thousand, four hundred forty-seven".