18121119580649 has 8 divisors (see below), whose sum is σ = 18730359781440. Its totient is φ = 17521949466000.

The previous prime is 18121119580639. The next prime is 18121119580657. The reversal of 18121119580649 is 94608591112181.

It is a happy number.

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 18121119580649 - 2²⁸ = 18120851145193 is a prime.

It is a super-2 number, since 2×18121119580649² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18121119580594 and 18121119580603.

It is not an unprimeable number, because it can be changed into a prime (18121119580639) 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, 2517517877 + ... + 2517525074.

It is an arithmetic number, because the mean of its divisors is an integer number (2341294972680).

Almost surely, 2^{18121119580649} is an apocalyptic number.

It is an amenable number.

18121119580649 is a deficient number, since it is larger than the sum of its proper divisors (609240200791).

18121119580649 is an equidigital number, since it uses as much as digits as its factorization.

18121119580649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035043071.

The product of its (nonzero) digits is 1244160, while the sum is 56.

The spelling of 18121119580649 in words is "eighteen trillion, one hundred twenty-one billion, one hundred nineteen million, five hundred eighty thousand, six hundred forty-nine".