617421427905 has 32 divisors (see below), whose sum is σ = 1022520066048. Its totient is φ = 317800728000.

The previous prime is 617421427877. The next prime is 617421427957. The reversal of 617421427905 is 509724124716.

It is not a de Polignac number, because 617421427905 - 2⁵ = 617421427873 is a prime.

It is a super-2 number, since 2×617421427905² (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 31 ways as a sum of consecutive naturals, for example, 1638321 + ... + 1979630.

It is an arithmetic number, because the mean of its divisors is an integer number (31953752064).

Almost surely, 2^617421427905 is an apocalyptic number.

It is an amenable number.

617421427905 is a deficient number, since it is larger than the sum of its proper divisors (405098638143).

617421427905 is a wasteful number, since it uses less digits than its factorization.

617421427905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618357.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 617421427905 in words is "six hundred seventeen billion, four hundred twenty-one million, four hundred twenty-seven thousand, nine hundred five".