38491647815 has 8 divisors (see below), whose sum is σ = 48198237408. Its totient is φ = 29454478240.

The previous prime is 38491647811. The next prime is 38491647841. The reversal of 38491647815 is 51874619483.

It is a happy number.

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

It is not a de Polignac number, because 38491647815 - 2² = 38491647811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38491647811) 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, 167354876 + ... + 167355105.

It is an arithmetic number, because the mean of its divisors is an integer number (6024779676).

Almost surely, 2^38491647815 is an apocalyptic number.

38491647815 is a deficient number, since it is larger than the sum of its proper divisors (9706589593).

38491647815 is a wasteful number, since it uses less digits than its factorization.

38491647815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334710009.

The product of its digits is 5806080, while the sum is 56.

The spelling of 38491647815 in words is "thirty-eight billion, four hundred ninety-one million, six hundred forty-seven thousand, eight hundred fifteen".