616833979440 has 120 divisors (see below), whose sum is σ = 2224378902960. Its totient is φ = 140990621184.

The previous prime is 616833979429. The next prime is 616833979441. The reversal of 616833979440 is 44979338616.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (616833979441) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 26214175 + ... + 26237694.

It is an arithmetic number, because the mean of its divisors is an integer number (18536490858).

Almost surely, 2^616833979440 is an apocalyptic number.

616833979440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

616833979440 is an abundant number, since it is smaller than the sum of its proper divisors (1607544923520).

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

616833979440 is a wasteful number, since it uses less digits than its factorization.

616833979440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52451899 (or 52451886 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 60.

The spelling of 616833979440 in words is "six hundred sixteen billion, eight hundred thirty-three million, nine hundred seventy-nine thousand, four hundred forty".