38840970491 has 4 divisors (see below), whose sum is σ = 38931089184. Its totient is φ = 38750851800.

The previous prime is 38840970479. The next prime is 38840970529. The reversal of 38840970491 is 19407904883.

38840970491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38840970491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38840979491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45058700 + ... + 45059561.

It is an arithmetic number, because the mean of its divisors is an integer number (9732772296).

Almost surely, 2^38840970491 is an apocalyptic number.

38840970491 is a deficient number, since it is larger than the sum of its proper divisors (90118693).

38840970491 is an equidigital number, since it uses as much as digits as its factorization.

38840970491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90118692.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 38840970491 in words is "thirty-eight billion, eight hundred forty million, nine hundred seventy thousand, four hundred ninety-one".