1850766013661 has 8 divisors (see below), whose sum is σ = 1871595320760. Its totient is φ = 1829937466368.

The previous prime is 1850766013651. The next prime is 1850766013687. The reversal of 1850766013661 is 1663106670581.

It can be written as a sum of positive squares in 4 ways, for example, as 402368205625 + 1448397808036 = 634325^2 + 1203494^2 .

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 1850766013661 - 2⁶ = 1850766013597 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 (1850766013651) 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, 5747255 + ... + 6060731.

It is an arithmetic number, because the mean of its divisors is an integer number (233949415095).

Almost surely, 2^{1850766013661} is an apocalyptic number.

It is an amenable number.

1850766013661 is a deficient number, since it is larger than the sum of its proper divisors (20829307099).

1850766013661 is an equidigital number, since it uses as much as digits as its factorization.

1850766013661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379903.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 1850766013661 in words is "one trillion, eight hundred fifty billion, seven hundred sixty-six million, thirteen thousand, six hundred sixty-one".