38781326491 has 8 divisors (see below), whose sum is σ = 39048242400. Its totient is φ = 38514499392.

The previous prime is 38781326443. The next prime is 38781326501. The reversal of 38781326491 is 19462318783.

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 38781326491 - 2¹⁷ = 38781195419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38781326401) 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, 1021831 + ... + 1059103.

It is an arithmetic number, because the mean of its divisors is an integer number (4881030300).

Almost surely, 2^38781326491 is an apocalyptic number.

38781326491 is a deficient number, since it is larger than the sum of its proper divisors (266915909).

38781326491 is a wasteful number, since it uses less digits than its factorization.

38781326491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44405.

The product of its digits is 1741824, while the sum is 52.

The spelling of 38781326491 in words is "thirty-eight billion, seven hundred eighty-one million, three hundred twenty-six thousand, four hundred ninety-one".