38166782639 has 4 divisors (see below), whose sum is σ = 38813677320. Its totient is φ = 37519887960.

The previous prime is 38166782629. The next prime is 38166782651. The reversal of 38166782639 is 93628766183.

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

It is a cyclic number.

It is not a de Polignac number, because 38166782639 - 2⁴ = 38166782623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 646894621 = 38166782639 / (3 + 8 + 1 + 6 + 6 + 7 + 8 + 2 + 6 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38166782629) 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, 323447252 + ... + 323447369.

It is an arithmetic number, because the mean of its divisors is an integer number (9703419330).

Almost surely, 2^38166782639 is an apocalyptic number.

38166782639 is a deficient number, since it is larger than the sum of its proper divisors (646894681).

38166782639 is an equidigital number, since it uses as much as digits as its factorization.

38166782639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646894680.

The product of its digits is 15676416, while the sum is 59.

The spelling of 38166782639 in words is "thirty-eight billion, one hundred sixty-six million, seven hundred eighty-two thousand, six hundred thirty-nine".