102205740779 has 4 divisors (see below), whose sum is σ = 102429386184. Its totient is φ = 101982095376.

The previous prime is 102205740731. The next prime is 102205740787. The reversal of 102205740779 is 977047502201.

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 102205740779 - 2¹² = 102205736683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102205760779) 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, 111822017 + ... + 111822930.

It is an arithmetic number, because the mean of its divisors is an integer number (25607346546).

Almost surely, 2^102205740779 is an apocalyptic number.

102205740779 is a deficient number, since it is larger than the sum of its proper divisors (223645405).

102205740779 is an equidigital number, since it uses as much as digits as its factorization.

102205740779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223645404.

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 102205740779 in words is "one hundred two billion, two hundred five million, seven hundred forty thousand, seven hundred seventy-nine".