1980871659 has 16 divisors (see below), whose sum is σ = 3160365600. Its totient is φ = 1218997728.

The previous prime is 1980871643. The next prime is 1980871687. The reversal of 1980871659 is 9561780891.

It is not a de Polignac number, because 1980871659 - 2⁴ = 1980871643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1980871639) 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, 2821404 + ... + 2822105.

It is an arithmetic number, because the mean of its divisors is an integer number (197522850).

Almost surely, 2^1980871659 is an apocalyptic number.

1980871659 is a deficient number, since it is larger than the sum of its proper divisors (1179493941).

1980871659 is a wasteful number, since it uses less digits than its factorization.

1980871659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643531 (or 5643525 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The square root of 1980871659 is about 44506.9843844761. The cubic root of 1980871659 is about 1255.8914760369.

The spelling of 1980871659 in words is "one billion, nine hundred eighty million, eight hundred seventy-one thousand, six hundred fifty-nine".