82578712322090 has 32 divisors (see below), whose sum is σ = 155289705575760. Its totient is φ = 31576701184000.

The previous prime is 82578712322081. The next prime is 82578712322129. The reversal of 82578712322090 is 9022321787528.

It is a Cunningham number, because it is equal to 9087283²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 29728327712161 + 52850384609929 = 5452369^2 + 7269827^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1409644871 + ... + 1409703450.

Almost surely, 2^{82578712322090} is an apocalyptic number.

82578712322090 is a deficient number, since it is larger than the sum of its proper divisors (72710993253670).

82578712322090 is a wasteful number, since it uses less digits than its factorization.

82578712322090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819348458.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 82578712322090 in words is "eighty-two trillion, five hundred seventy-eight billion, seven hundred twelve million, three hundred twenty-two thousand, ninety".