192778242820 has 12 divisors (see below), whose sum is σ = 404834309964. Its totient is φ = 77111297120.

The previous prime is 192778242817. The next prime is 192778242851. The reversal of 192778242820 is 28242877291.

It can be written as a sum of positive squares in 2 ways, for example, as 27311528644 + 165466714176 = 165262^2 + 406776^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4819456051 + ... + 4819456090.

It is an arithmetic number, because the mean of its divisors is an integer number (33736192497).

Almost surely, 2^192778242820 is an apocalyptic number.

192778242820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

192778242820 is an abundant number, since it is smaller than the sum of its proper divisors (212056067144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

192778242820 is a wasteful number, since it uses less digits than its factorization.

192778242820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638912150 (or 9638912148 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 192778242820 in words is "one hundred ninety-two billion, seven hundred seventy-eight million, two hundred forty-two thousand, eight hundred twenty".