618118553523 has 4 divisors (see below), whose sum is σ = 824158071368. Its totient is φ = 412079035680.

The previous prime is 618118553519. The next prime is 618118553539. The reversal of 618118553523 is 325355811816.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 618118553523 - 2² = 618118553519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618118553593) 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, 103019758918 + ... + 103019758923.

It is an arithmetic number, because the mean of its divisors is an integer number (206039517842).

Almost surely, 2^618118553523 is an apocalyptic number.

618118553523 is a deficient number, since it is larger than the sum of its proper divisors (206039517845).

618118553523 is a wasteful number, since it uses less digits than its factorization.

618118553523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206039517844.

The product of its digits is 864000, while the sum is 48.

The spelling of 618118553523 in words is "six hundred eighteen billion, one hundred eighteen million, five hundred fifty-three thousand, five hundred twenty-three".