1981707030858 has 64 divisors (see below), whose sum is σ = 4140913570560. Its totient is φ = 631442499072.

The previous prime is 1981707030847. The next prime is 1981707030859. The reversal of 1981707030858 is 8580307071891.

It is a junction number, because it is equal to n+sod(n) for n = 1981707030798 and 1981707030807.

It is not an unprimeable number, because it can be changed into a prime (1981707030859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88469716 + ... + 88492112.

It is an arithmetic number, because the mean of its divisors is an integer number (64701774540).

Almost surely, 2^{1981707030858} is an apocalyptic number.

1981707030858 is an abundant number, since it is smaller than the sum of its proper divisors (2159206539702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981707030858 is a wasteful number, since it uses less digits than its factorization.

1981707030858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27471.

The product of its (nonzero) digits is 3386880, while the sum is 57.

The spelling of 1981707030858 in words is "one trillion, nine hundred eighty-one billion, seven hundred seven million, thirty thousand, eight hundred fifty-eight".