1981276838113 has 16 divisors (see below), whose sum is σ = 2023762728960. Its totient is φ = 1939278978000.

The previous prime is 1981276838111. The next prime is 1981276838119. The reversal of 1981276838113 is 3118386721891.

It is a cyclic number.

It is not a de Polignac number, because 1981276838113 - 2¹ = 1981276838111 is a prime.

It is a super-3 number, since 3×1981276838113³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1981276838111) 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, 5688006 + ... + 6026272.

It is an arithmetic number, because the mean of its divisors is an integer number (126485170560).

Almost surely, 2^{1981276838113} is an apocalyptic number.

It is an amenable number.

1981276838113 is a deficient number, since it is larger than the sum of its proper divisors (42485890847).

1981276838113 is a wasteful number, since it uses less digits than its factorization.

1981276838113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338988.

The product of its digits is 3483648, while the sum is 58.

The spelling of 1981276838113 in words is "one trillion, nine hundred eighty-one billion, two hundred seventy-six million, eight hundred thirty-eight thousand, one hundred thirteen".