1861120799 has 16 divisors (see below), whose sum is σ = 1910304000. Its totient is φ = 1812720000.

The previous prime is 1861120787. The next prime is 1861120801. The reversal of 1861120799 is 9970211681.

It is a cyclic number.

It is not a de Polignac number, because 1861120799 - 2⁴ = 1861120783 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 (1861120769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3729452 + ... + 3729950.

It is an arithmetic number, because the mean of its divisors is an integer number (119394000).

Almost surely, 2^1861120799 is an apocalyptic number.

1861120799 is a deficient number, since it is larger than the sum of its proper divisors (49183201).

1861120799 is a wasteful number, since it uses less digits than its factorization.

1861120799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102.

The product of its (nonzero) digits is 54432, while the sum is 44.

The square root of 1861120799 is about 43140.7093010766. The cubic root of 1861120799 is about 1230.0559163334.

The spelling of 1861120799 in words is "one billion, eight hundred sixty-one million, one hundred twenty thousand, seven hundred ninety-nine".