38539537978 has 8 divisors (see below), whose sum is σ = 60322755168. Its totient is φ = 18431952924.

The previous prime is 38539537973. The next prime is 38539537991. The reversal of 38539537978 is 87973593583.

38539537978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (38539537973) 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, 418907976 + ... + 418908067.

It is an arithmetic number, because the mean of its divisors is an integer number (7540344396).

Almost surely, 2^38539537978 is an apocalyptic number.

38539537978 is a deficient number, since it is larger than the sum of its proper divisors (21783217190).

38539537978 is a wasteful number, since it uses less digits than its factorization.

38539537978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837816068.

The product of its digits is 171460800, while the sum is 67.

The spelling of 38539537978 in words is "thirty-eight billion, five hundred thirty-nine million, five hundred thirty-seven thousand, nine hundred seventy-eight".