1981392179716 has 12 divisors (see below), whose sum is σ = 3478730897488. Its totient is φ = 987469066152.

The previous prime is 1981392179707. The next prime is 1981392179717. The reversal of 1981392179716 is 6179712931891.

It is a super-3 number, since 3×1981392179716³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1981392179717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806754546 + ... + 806757001.

Almost surely, 2^{1981392179716} is an apocalyptic number.

It is an amenable number.

1981392179716 is a deficient number, since it is larger than the sum of its proper divisors (1497338717772).

1981392179716 is a wasteful number, since it uses less digits than its factorization.

1981392179716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613511858 (or 1613511856 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 64.

The spelling of 1981392179716 in words is "one trillion, nine hundred eighty-one billion, three hundred ninety-two million, one hundred seventy-nine thousand, seven hundred sixteen".