2081310809578 has 32 divisors (see below), whose sum is σ = 4191730865280. Its totient is φ = 748523367360.

The previous prime is 2081310809573. The next prime is 2081310809609. The reversal of 2081310809578 is 8759080131802.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2081310809573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519805893 + ... + 519809896.

It is an arithmetic number, because the mean of its divisors is an integer number (130991589540).

Almost surely, 2^{2081310809578} is an apocalyptic number.

2081310809578 is an abundant number, since it is smaller than the sum of its proper divisors (2110420055702).

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

2081310809578 is a wasteful number, since it uses less digits than its factorization.

2081310809578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039615822.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 2081310809578 in words is "two trillion, eighty-one billion, three hundred ten million, eight hundred nine thousand, five hundred seventy-eight".