618539949500 has 48 divisors (see below), whose sum is σ = 1473699558240. Its totient is φ = 224923616000.

The previous prime is 618539949451. The next prime is 618539949523. The reversal of 618539949500 is 5949935816.

It is a self number, because there is not a number n which added to its sum of digits gives 618539949500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56225405 + ... + 56236404.

It is an arithmetic number, because the mean of its divisors is an integer number (30702074130).

Almost surely, 2^618539949500 is an apocalyptic number.

It is an amenable number.

618539949500 is an abundant number, since it is smaller than the sum of its proper divisors (855159608740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618539949500 is a wasteful number, since it uses less digits than its factorization.

618539949500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112461839 (or 112461827 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 59.

The spelling of 618539949500 in words is "six hundred eighteen billion, five hundred thirty-nine million, nine hundred forty-nine thousand, five hundred".