618544949500 has 24 divisors (see below), whose sum is σ = 1350902170800. Its totient is φ = 247417979600.

The previous prime is 618544949417. The next prime is 618544949501. The reversal of 618544949500 is 5949445816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618544949501) 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, 618544450 + ... + 618545449.

It is an arithmetic number, because the mean of its divisors is an integer number (56287590450).

Almost surely, 2^618544949500 is an apocalyptic number.

It is an amenable number.

618544949500 is an abundant number, since it is smaller than the sum of its proper divisors (732357221300).

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

618544949500 is a wasteful number, since it uses less digits than its factorization.

618544949500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237089918 (or 1237089906 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 618544949500 in words is "six hundred eighteen billion, five hundred forty-four million, nine hundred forty-nine thousand, five hundred".