616531781105 has 16 divisors (see below), whose sum is σ = 740319628800. Its totient is φ = 492904560960.

The previous prime is 616531781077. The next prime is 616531781111. The reversal of 616531781105 is 501187135616.

It is a de Polignac number, because none of the positive numbers 2^k-616531781105 is a prime.

It is a super-2 number, since 2×616531781105² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 70706936 + ... + 70715654.

It is an arithmetic number, because the mean of its divisors is an integer number (46269976800).

Almost surely, 2^616531781105 is an apocalyptic number.

It is an amenable number.

616531781105 is a deficient number, since it is larger than the sum of its proper divisors (123787847695).

616531781105 is a wasteful number, since it uses less digits than its factorization.

616531781105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16304.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 616531781105 in words is "six hundred sixteen billion, five hundred thirty-one million, seven hundred eighty-one thousand, one hundred five".