38779142789 has 8 divisors (see below), whose sum is σ = 38875515000. Its totient is φ = 38682850752.

The previous prime is 38779142783. The next prime is 38779142803. The reversal of 38779142789 is 98724197783.

It can be written as a sum of positive squares in 4 ways, for example, as 20045745889 + 18733396900 = 141583^2 + 136870^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38779142789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38779142783) 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, 1013987 + ... + 1051535.

It is an arithmetic number, because the mean of its divisors is an integer number (4859439375).

Almost surely, 2^38779142789 is an apocalyptic number.

It is an amenable number.

38779142789 is a deficient number, since it is larger than the sum of its proper divisors (96372211).

38779142789 is a wasteful number, since it uses less digits than its factorization.

38779142789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40087.

The product of its digits is 42674688, while the sum is 65.

The spelling of 38779142789 in words is "thirty-eight billion, seven hundred seventy-nine million, one hundred forty-two thousand, seven hundred eighty-nine".