1981413290842 has 16 divisors (see below), whose sum is σ = 2973292660800. Its totient is φ = 990315817120.

The previous prime is 1981413290809. The next prime is 1981413290947. The reversal of 1981413290842 is 2480923141891.

It is a super-3 number, since 3×1981413290842³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1981413290842.

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, 74249742 + ... + 74276422.

It is an arithmetic number, because the mean of its divisors is an integer number (185830791300).

Almost surely, 2^{1981413290842} is an apocalyptic number.

1981413290842 is a deficient number, since it is larger than the sum of its proper divisors (991879369958).

1981413290842 is a wasteful number, since it uses less digits than its factorization.

1981413290842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39941.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 1981413290842 in words is "one trillion, nine hundred eighty-one billion, four hundred thirteen million, two hundred ninety thousand, eight hundred forty-two".