616534643140 has 48 divisors (see below), whose sum is σ = 1395574734960. Its totient is φ = 227438184960.

The previous prime is 616534643047. The next prime is 616534643159. The reversal of 616534643140 is 41346435616.

It can be written as a sum of positive squares in 8 ways, for example, as 65543168196 + 550991474944 = 256014^2 + 742288^2 .

It is a super-2 number, since 2×616534643140² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780771 + ... + 1357450.

It is an arithmetic number, because the mean of its divisors is an integer number (29074473645).

Almost surely, 2^616534643140 is an apocalyptic number.

It is an amenable number.

616534643140 is an abundant number, since it is smaller than the sum of its proper divisors (779040091820).

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

616534643140 is a wasteful number, since it uses less digits than its factorization.

616534643140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139352 (or 2139350 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 616534643140 in words is "six hundred sixteen billion, five hundred thirty-four million, six hundred forty-three thousand, one hundred forty".