613869451656 has 64 divisors (see below), whose sum is σ = 1600511162880. Its totient is φ = 195980912640.

The previous prime is 613869451651. The next prime is 613869451711. The reversal of 613869451656 is 656154968316.

It is a super-2 number, since 2×613869451656² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 613869451656.

It is not an unprimeable number, because it can be changed into a prime (613869451651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4180891 + ... + 4325226.

It is an arithmetic number, because the mean of its divisors is an integer number (25007986920).

Almost surely, 2^613869451656 is an apocalyptic number.

It is an amenable number.

613869451656 is an abundant number, since it is smaller than the sum of its proper divisors (986641711224).

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

613869451656 is a wasteful number, since it uses less digits than its factorization.

613869451656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8506254 (or 8506250 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 613869451656 in words is "six hundred thirteen billion, eight hundred sixty-nine million, four hundred fifty-one thousand, six hundred fifty-six".