38261891369 has 16 divisors (see below), whose sum is σ = 41787071424. Its totient is φ = 34821595200.

The previous prime is 38261891351. The next prime is 38261891377. The reversal of 38261891369 is 96319816283.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 38261891369 - 2³² = 33966924073 is a prime.

It is a super-2 number, since 2×38261891369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38261891309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493679 + ... + 565899.

It is an arithmetic number, because the mean of its divisors is an integer number (2611691964).

Almost surely, 2^38261891369 is an apocalyptic number.

It is an amenable number.

38261891369 is a deficient number, since it is larger than the sum of its proper divisors (3525180055).

38261891369 is a wasteful number, since it uses less digits than its factorization.

38261891369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72808.

The product of its digits is 3359232, while the sum is 56.

The spelling of 38261891369 in words is "thirty-eight billion, two hundred sixty-one million, eight hundred ninety-one thousand, three hundred sixty-nine".