2085542633781 has 12 divisors (see below), whose sum is σ = 3015316755360. Its totient is φ = 1389038855400.

The previous prime is 2085542633767. The next prime is 2085542633813. The reversal of 2085542633781 is 1873362455802.

2085542633781 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 5 + 4 + 263 + 378 + 1 = 666.

It is not a de Polignac number, because 2085542633781 - 2⁷ = 2085542633653 is a prime.

It is a super-2 number, since 2×2085542633781² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2085542633381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110231721 + ... + 110250638.

It is an arithmetic number, because the mean of its divisors is an integer number (251276396280).

Almost surely, 2^{2085542633781} is an apocalyptic number.

It is an amenable number.

2085542633781 is a deficient number, since it is larger than the sum of its proper divisors (929774121579).

2085542633781 is a wasteful number, since it uses less digits than its factorization.

2085542633781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220483416 (or 220483413 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 2085542633781 in words is "two trillion, eighty-five billion, five hundred forty-two million, six hundred thirty-three thousand, seven hundred eighty-one".