2061190109581 has 8 divisors (see below), whose sum is σ = 2094476731704. Its totient is φ = 2028149145600.

The previous prime is 2061190109557. The next prime is 2061190109591. The reversal of 2061190109581 is 1859010911602.

It can be written as a sum of positive squares in 4 ways, for example, as 1185777256356 + 875412853225 = 1088934^2 + 935635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2061190109581 - 2¹³ = 2061190101389 is a prime.

It is a super-2 number, since 2×2061190109581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061190109521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61397620 + ... + 61431181.

It is an arithmetic number, because the mean of its divisors is an integer number (261809591463).

Almost surely, 2^{2061190109581} is an apocalyptic number.

It is an amenable number.

2061190109581 is a deficient number, since it is larger than the sum of its proper divisors (33286622123).

2061190109581 is a wasteful number, since it uses less digits than its factorization.

2061190109581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122829071.

The product of its (nonzero) digits is 38880, while the sum is 43.

The spelling of 2061190109581 in words is "two trillion, sixty-one billion, one hundred ninety million, one hundred nine thousand, five hundred eighty-one".