616211606531 has 4 divisors (see below), whose sum is σ = 616214700312. Its totient is φ = 616208512752.

The previous prime is 616211606513. The next prime is 616211606551. The reversal of 616211606531 is 135606112616.

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 616211606531 - 2¹⁰ = 616211605507 is a prime.

It is a super-2 number, since 2×616211606531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616211606551) 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 3 ways as a sum of consecutive naturals, for example, 1225925 + ... + 1653878.

It is an arithmetic number, because the mean of its divisors is an integer number (154053675078).

Almost surely, 2^616211606531 is an apocalyptic number.

616211606531 is a deficient number, since it is larger than the sum of its proper divisors (3093781).

616211606531 is a wasteful number, since it uses less digits than its factorization.

616211606531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093780.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 616211606531 in words is "six hundred sixteen billion, two hundred eleven million, six hundred six thousand, five hundred thirty-one".