2045651981850 has 36 divisors (see below), whose sum is σ = 5495984992446. Its totient is φ = 545507195040.

The previous prime is 2045651981827. The next prime is 2045651981869. The reversal of 2045651981850 is 581891565402.

2045651981850 is a `hidden beast` number, since 2 + 0 + 4 + 565 + 19 + 8 + 18 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 915889194441 + 1129762787409 = 957021^2 + 1062903^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2272946197 + ... + 2272947096.

Almost surely, 2^{2045651981850} is an apocalyptic number.

2045651981850 is an abundant number, since it is smaller than the sum of its proper divisors (3450333010596).

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

2045651981850 is a wasteful number, since it uses less digits than its factorization.

2045651981850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545893311 (or 4545893303 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 54.

The spelling of 2045651981850 in words is "two trillion, forty-five billion, six hundred fifty-one million, nine hundred eighty-one thousand, eight hundred fifty".