38402067779 has 4 divisors (see below), whose sum is σ = 38928123576. Its totient is φ = 37876011984.

The previous prime is 38402067707. The next prime is 38402067799. The reversal of 38402067779 is 97776020483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97776020483 = 263 ⋅371771941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38402067779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38402067779.

It is not an unprimeable number, because it can be changed into a prime (38402067799) 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, 263027789 + ... + 263027934.

It is an arithmetic number, because the mean of its divisors is an integer number (9732030894).

Almost surely, 2^38402067779 is an apocalyptic number.

38402067779 is a deficient number, since it is larger than the sum of its proper divisors (526055797).

38402067779 is an equidigital number, since it uses as much as digits as its factorization.

38402067779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526055796.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 38402067779 in words is "thirty-eight billion, four hundred two million, sixty-seven thousand, seven hundred seventy-nine".