38551966381 has 8 divisors (see below), whose sum is σ = 39272214240. Its totient is φ = 37833946128.

The previous prime is 38551966331. The next prime is 38551966399. The reversal of 38551966381 is 18366915583.

38551966381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38551966381 - 2⁷ = 38551966253 is a prime.

It is a super-2 number, since 2×38551966381² (a number of 22 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 (38551966331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521946 + ... + 591211.

It is an arithmetic number, because the mean of its divisors is an integer number (4909026780).

Almost surely, 2^38551966381 is an apocalyptic number.

It is an amenable number.

38551966381 is a deficient number, since it is larger than the sum of its proper divisors (720247859).

38551966381 is a wasteful number, since it uses less digits than its factorization.

38551966381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113803.

The product of its digits is 4665600, while the sum is 55.

The spelling of 38551966381 in words is "thirty-eight billion, five hundred fifty-one million, nine hundred sixty-six thousand, three hundred eighty-one".