1981707030898 has 32 divisors (see below), whose sum is σ = 3419271513216. Its totient is φ = 843791862528.

The previous prime is 1981707030859. The next prime is 1981707030917. The reversal of 1981707030898 is 8980307071891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6311640 + ... + 6618172.

It is an arithmetic number, because the mean of its divisors is an integer number (106852234788).

Almost surely, 2^{1981707030898} is an apocalyptic number.

1981707030898 is a deficient number, since it is larger than the sum of its proper divisors (1437564482318).

1981707030898 is a wasteful number, since it uses less digits than its factorization.

1981707030898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309538.

The product of its (nonzero) digits is 6096384, while the sum is 61.

The spelling of 1981707030898 in words is "one trillion, nine hundred eighty-one billion, seven hundred seven million, thirty thousand, eight hundred ninety-eight".