2611043861 has 4 divisors (see below), whose sum is σ = 2681612652. Its totient is φ = 2540475072.

The previous prime is 2611043837. The next prime is 2611043863. The reversal of 2611043861 is 1683401162.

2611043861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1788444100 + 822599761 = 42290^2 + 28681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2611043861 - 2¹⁸ = 2610781717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2611043863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35284340 + ... + 35284413.

It is an arithmetic number, because the mean of its divisors is an integer number (670403163).

Almost surely, 2^2611043861 is an apocalyptic number.

It is an amenable number.

2611043861 is a deficient number, since it is larger than the sum of its proper divisors (70568791).

2611043861 is an equidigital number, since it uses as much as digits as its factorization.

2611043861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70568790.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2611043861 is about 51098.3743479183. The cubic root of 2611043861 is about 1377.0130489182.

The spelling of 2611043861 in words is "two billion, six hundred eleven million, forty-three thousand, eight hundred sixty-one".