617661505059 has 16 divisors (see below), whose sum is σ = 827713111680. Its totient is φ = 409695624000.

The previous prime is 617661505001. The next prime is 617661505063. The reversal of 617661505059 is 950505166716.

It is not a de Polignac number, because 617661505059 - 2¹³ = 617661496867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617661505099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267852 + ... + 1143270.

It is an arithmetic number, because the mean of its divisors is an integer number (51732069480).

Almost surely, 2^617661505059 is an apocalyptic number.

617661505059 is a deficient number, since it is larger than the sum of its proper divisors (210051606621).

617661505059 is a wasteful number, since it uses less digits than its factorization.

617661505059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876610.

The product of its (nonzero) digits is 1701000, while the sum is 51.

The spelling of 617661505059 in words is "six hundred seventeen billion, six hundred sixty-one million, five hundred five thousand, fifty-nine".