38978109513 has 24 divisors (see below), whose sum is σ = 65713859328. Its totient is φ = 21799305792.

The previous prime is 38978109497. The next prime is 38978109553. The reversal of 38978109513 is 31590187983.

38978109513 is a `hidden beast` number, since 38 + 97 + 8 + 1 + 0 + 9 + 513 = 666.

It is not a de Polignac number, because 38978109513 - 2⁴ = 38978109497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38978109513.

It is not an unprimeable number, because it can be changed into a prime (38978109553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6578956 + ... + 6584877.

It is an arithmetic number, because the mean of its divisors is an integer number (2738077472).

Almost surely, 2^38978109513 is an apocalyptic number.

It is an amenable number.

38978109513 is a deficient number, since it is larger than the sum of its proper divisors (26735749815).

38978109513 is a wasteful number, since it uses less digits than its factorization.

38978109513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13163893 (or 13163890 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 38978109513 in words is "thirty-eight billion, nine hundred seventy-eight million, one hundred nine thousand, five hundred thirteen".