38777000809 has 4 divisors (see below), whose sum is σ = 39132753220. Its totient is φ = 38421248400.

The previous prime is 38777000807. The next prime is 38777000819. The reversal of 38777000809 is 90800077783.

38777000809 = T₁₆₀₇₈₂ + T₁₆₀₇₈₃ + T₁₆₀₇₈₄.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90800077783 = 4079 ⋅22260377.

It can be written as a sum of positive squares in 2 ways, for example, as 34149192025 + 4627808784 = 184795^2 + 68028^2 .

It is a cyclic number.

It is not a de Polignac number, because 38777000809 - 2¹ = 38777000807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38777000807) 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, 177876042 + ... + 177876259.

It is an arithmetic number, because the mean of its divisors is an integer number (9783188305).

Almost surely, 2^38777000809 is an apocalyptic number.

38777000809 is the 160784-th centered triangular number.

It is an amenable number.

38777000809 is a deficient number, since it is larger than the sum of its proper divisors (355752411).

38777000809 is a wasteful number, since it uses less digits than its factorization.

38777000809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355752410.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 38777000809 in words is "thirty-eight billion, seven hundred seventy-seven million, eight hundred nine", and thus it is an aban number.