1861326114077 has 4 divisors (see below), whose sum is σ = 1861333530876. Its totient is φ = 1861318697280.

The previous prime is 1861326114049. The next prime is 1861326114097. The reversal of 1861326114077 is 7704116231681.

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 1039204903396 + 822121210681 = 1019414^2 + 906709^2 .

It is a cyclic number.

It is not a de Polignac number, because 1861326114077 - 2¹⁴ = 1861326097693 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 (1861326114007) 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, 3318278 + ... + 3838439.

It is an arithmetic number, because the mean of its divisors is an integer number (465333382719).

Almost surely, 2^{1861326114077} is an apocalyptic number.

It is an amenable number.

1861326114077 is a deficient number, since it is larger than the sum of its proper divisors (7416799).

1861326114077 is an equidigital number, since it uses as much as digits as its factorization.

1861326114077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7416798.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 1861326114077 in words is "one trillion, eight hundred sixty-one billion, three hundred twenty-six million, one hundred fourteen thousand, seventy-seven".