1993720771911 has 8 divisors (see below), whose sum is σ = 2899957486464. Its totient is φ = 1208315619320.

The previous prime is 1993720771891. The next prime is 1993720771937. The reversal of 1993720771911 is 1191770273991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1993720771911 - 2⁵ = 1993720771879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993720771951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30207890451 + ... + 30207890516.

It is an arithmetic number, because the mean of its divisors is an integer number (362494685808).

Almost surely, 2^{1993720771911} is an apocalyptic number.

1993720771911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1993720771911 is a deficient number, since it is larger than the sum of its proper divisors (906236714553).

1993720771911 is a wasteful number, since it uses less digits than its factorization.

1993720771911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60415780981.

The product of its (nonzero) digits is 1500282, while the sum is 57.

The spelling of 1993720771911 in words is "one trillion, nine hundred ninety-three billion, seven hundred twenty million, seven hundred seventy-one thousand, nine hundred eleven".