118197819451 has 4 divisors (see below), whose sum is σ = 118198584504. Its totient is φ = 118197054400.

The previous prime is 118197819409. The next prime is 118197819463. The reversal of 118197819451 is 154918791811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 118197819451 - 2¹⁵ = 118197786683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118197819392 and 118197819401.

It is not an unprimeable number, because it can be changed into a prime (118197819251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60310 + ... + 489931.

It is an arithmetic number, because the mean of its divisors is an integer number (29549646126).

Almost surely, 2^118197819451 is an apocalyptic number.

118197819451 is a deficient number, since it is larger than the sum of its proper divisors (765053).

118197819451 is an equidigital number, since it uses as much as digits as its factorization.

118197819451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765052.

The product of its digits is 725760, while the sum is 55.

The spelling of 118197819451 in words is "one hundred eighteen billion, one hundred ninety-seven million, eight hundred nineteen thousand, four hundred fifty-one".