1980861722 has 16 divisors (see below), whose sum is σ = 3397946112. Its totient is φ = 848394960.

The previous prime is 1980861719. The next prime is 1980861749. The reversal of 1980861722 is 2271680891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22529 + ... + 66852.

It is an arithmetic number, because the mean of its divisors is an integer number (212371632).

Almost surely, 2^1980861722 is an apocalyptic number.

1980861722 is a deficient number, since it is larger than the sum of its proper divisors (1417084390).

1980861722 is a wasteful number, since it uses less digits than its factorization.

1980861722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90973.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1980861722 is about 44506.8727501720. The cubic root of 1980861722 is about 1255.8893759825.

The spelling of 1980861722 in words is "one billion, nine hundred eighty million, eight hundred sixty-one thousand, seven hundred twenty-two".