38166820507 has 2 divisors, whose sum is σ = 38166820508. Its totient is φ = 38166820506.

The previous prime is 38166820477. The next prime is 38166820543. The reversal of 38166820507 is 70502866183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38166820507 is a prime.

It is a super-2 number, since 2×38166820507² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38166820907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19083410253 + 19083410254.

It is an arithmetic number, because the mean of its divisors is an integer number (19083410254).

Almost surely, 2^38166820507 is an apocalyptic number.

38166820507 is a deficient number, since it is larger than the sum of its proper divisors (1).

38166820507 is an equidigital number, since it uses as much as digits as its factorization.

38166820507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 38166820507 in words is "thirty-eight billion, one hundred sixty-six million, eight hundred twenty thousand, five hundred seven".