38491647816 has 32 divisors (see below), whose sum is σ = 96236364960. Its totient is φ = 12829583232.

The previous prime is 38491647811. The next prime is 38491647841. The reversal of 38491647816 is 61874619483.

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, 311851 + ... + 417413.

It is an arithmetic number, because the mean of its divisors is an integer number (3007386405).

Almost surely, 2^38491647816 is an apocalyptic number.

It is an amenable number.

38491647816 is an abundant number, since it is smaller than the sum of its proper divisors (57744717144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38491647816 is a wasteful number, since it uses less digits than its factorization.

38491647816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120765 (or 120761 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The spelling of 38491647816 in words is "thirty-eight billion, four hundred ninety-one million, six hundred forty-seven thousand, eight hundred sixteen".