605649533940 has 720 divisors, whose sum is σ = 2258804427264. Its totient is φ = 134565235200.

The previous prime is 605649533933. The next prime is 605649533999. The reversal of 605649533940 is 49335946506.

605649533940 is a `hidden beast` number, since 6 + 0 + 5 + 64 + 9 + 533 + 9 + 40 = 666.

605649533940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×605649533940² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 199422102 + ... + 199425138.

Almost surely, 2^605649533940 is an apocalyptic number.

605649533940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 605649533940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129402213632).

605649533940 is an abundant number, since it is smaller than the sum of its proper divisors (1653154893324).

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

605649533940 is a wasteful number, since it uses less digits than its factorization.

605649533940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 54.

The spelling of 605649533940 in words is "six hundred five billion, six hundred forty-nine million, five hundred thirty-three thousand, nine hundred forty".