206754390779 has 32 divisors (see below), whose sum is σ = 244199188800. Its totient is φ = 173652111360.

The previous prime is 206754390749. The next prime is 206754390863. The reversal of 206754390779 is 977093457602.

It is not a de Polignac number, because 206754390779 - 2¹⁶ = 206754325243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206754390709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114869 + ... + 653225.

It is an arithmetic number, because the mean of its divisors is an integer number (7631224650).

Almost surely, 2^206754390779 is an apocalyptic number.

206754390779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

206754390779 is a deficient number, since it is larger than the sum of its proper divisors (37444798021).

206754390779 is a wasteful number, since it uses less digits than its factorization.

206754390779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538463.

The product of its (nonzero) digits is 20003760, while the sum is 59.

The spelling of 206754390779 in words is "two hundred six billion, seven hundred fifty-four million, three hundred ninety thousand, seven hundred seventy-nine".