38899807989581 has 64 divisors (see below), whose sum is σ = 51446666059776. Its totient is φ = 28512823046400.

The previous prime is 38899807989571. The next prime is 38899807989641. The reversal of 38899807989581 is 18598970899883.

It is not a de Polignac number, because 38899807989581 - 2¹⁰ = 38899807988557 is a prime.

It is a super-2 number, since 2×38899807989581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38899807989571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 607426295 + ... + 607490331.

It is an arithmetic number, because the mean of its divisors is an integer number (803854157184).

Almost surely, 2^{38899807989581} is an apocalyptic number.

It is an amenable number.

38899807989581 is a deficient number, since it is larger than the sum of its proper divisors (12546858070195).

38899807989581 is a wasteful number, since it uses less digits than its factorization.

38899807989581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69762.

The product of its (nonzero) digits is 22574039040, while the sum is 92.

The spelling of 38899807989581 in words is "thirty-eight trillion, eight hundred ninety-nine billion, eight hundred seven million, nine hundred eighty-nine thousand, five hundred eighty-one".