1982801851 has 8 divisors (see below), whose sum is σ = 2115970560. Its totient is φ = 1851470208.

The previous prime is 1982801839. The next prime is 1982801869. The reversal of 1982801851 is 1581082891.

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 1982801851 - 2⁹ = 1982801339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1982801798 and 1982801807.

It is not an unprimeable number, because it can be changed into a prime (1982802851) 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, 457036 + ... + 461353.

It is an arithmetic number, because the mean of its divisors is an integer number (264496320).

Almost surely, 2^1982801851 is an apocalyptic number.

1982801851 is a deficient number, since it is larger than the sum of its proper divisors (133168709).

1982801851 is a wasteful number, since it uses less digits than its factorization.

1982801851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918533.

The product of its (nonzero) digits is 46080, while the sum is 43.

The square root of 1982801851 is about 44528.6632518875. The cubic root of 1982801851 is about 1256.2992636440.

The spelling of 1982801851 in words is "one billion, nine hundred eighty-two million, eight hundred one thousand, eight hundred fifty-one".