1991741424153 has 16 divisors (see below), whose sum is σ = 2860036569600. Its totient is φ = 1225644102144.

The previous prime is 1991741424143. The next prime is 1991741424161. The reversal of 1991741424153 is 3514241471991.

It is a happy number.

It is not a de Polignac number, because 1991741424153 - 2⁹ = 1991741423641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1991741424096 and 1991741424105.

It is not an unprimeable number, because it can be changed into a prime (1991741424103) 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, 252073 + ... + 2011721.

It is an arithmetic number, because the mean of its divisors is an integer number (178752285600).

Almost surely, 2^{1991741424153} is an apocalyptic number.

1991741424153 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1991741424153 is a deficient number, since it is larger than the sum of its proper divisors (868295145447).

1991741424153 is a wasteful number, since it uses less digits than its factorization.

1991741424153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788688.

The product of its digits is 1088640, while the sum is 51.

The spelling of 1991741424153 in words is "one trillion, nine hundred ninety-one billion, seven hundred forty-one million, four hundred twenty-four thousand, one hundred fifty-three".