38181650507878 has 4 divisors (see below), whose sum is σ = 57272475761820. Its totient is φ = 19090825253938.

The previous prime is 38181650507857. The next prime is 38181650507933. The reversal of 38181650507878 is 87870505618183.

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

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9545412626968 + ... + 9545412626971.

It is an arithmetic number, because the mean of its divisors is an integer number (14318118940455).

Almost surely, 2^{38181650507878} is an apocalyptic number.

38181650507878 is a deficient number, since it is larger than the sum of its proper divisors (19090825253942).

38181650507878 is a wasteful number, since it uses less digits than its factorization.

38181650507878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19090825253941.

The product of its (nonzero) digits is 90316800, while the sum is 67.

The spelling of 38181650507878 in words is "thirty-eight trillion, one hundred eighty-one billion, six hundred fifty million, five hundred seven thousand, eight hundred seventy-eight".