38905887081 has 8 divisors (see below), whose sum is σ = 54925958304. Its totient is φ = 24411536960.

The previous prime is 38905887037. The next prime is 38905887091. The reversal of 38905887081 is 18078850983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38905887081 - 2⁶ = 38905887017 is a prime.

It is a super-2 number, since 2×38905887081² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38905887091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381430215 + ... + 381430316.

It is an arithmetic number, because the mean of its divisors is an integer number (6865744788).

Almost surely, 2^38905887081 is an apocalyptic number.

It is an amenable number.

38905887081 is a deficient number, since it is larger than the sum of its proper divisors (16020071223).

38905887081 is a wasteful number, since it uses less digits than its factorization.

38905887081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762860551.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 38905887081 in words is "thirty-eight billion, nine hundred five million, eight hundred eighty-seven thousand, eighty-one".