38291638639 has 2 divisors, whose sum is σ = 38291638640. Its totient is φ = 38291638638.

The previous prime is 38291638577. The next prime is 38291638669. The reversal of 38291638639 is 93683619283.

38291638639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38291638639 - 2⁹ = 38291638127 is a prime.

It is a super-3 number, since 3×38291638639³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38291638669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19145819319 + 19145819320.

It is an arithmetic number, because the mean of its divisors is an integer number (19145819320).

Almost surely, 2^38291638639 is an apocalyptic number.

38291638639 is a deficient number, since it is larger than the sum of its proper divisors (1).

38291638639 is an equidigital number, since it uses as much as digits as its factorization.

38291638639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 58.

The spelling of 38291638639 in words is "thirty-eight billion, two hundred ninety-one million, six hundred thirty-eight thousand, six hundred thirty-nine".