616513935871 has 4 divisors (see below), whose sum is σ = 617132305912. Its totient is φ = 615895565832.

The previous prime is 616513935847. The next prime is 616513935893. The reversal of 616513935871 is 178539315616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616513935871 - 2⁵ = 616513935839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616513935071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309183525 + ... + 309185518.

It is an arithmetic number, because the mean of its divisors is an integer number (154283076478).

Almost surely, 2^616513935871 is an apocalyptic number.

616513935871 is a deficient number, since it is larger than the sum of its proper divisors (618370041).

616513935871 is an equidigital number, since it uses as much as digits as its factorization.

616513935871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618370040.

The product of its digits is 4082400, while the sum is 55.

The spelling of 616513935871 in words is "six hundred sixteen billion, five hundred thirteen million, nine hundred thirty-five thousand, eight hundred seventy-one".