617401640 has 16 divisors (see below), whose sum is σ = 1389153780. Its totient is φ = 246960640.

The previous prime is 617401639. The next prime is 617401651. The reversal of 617401640 is 46104716.

It can be written as a sum of positive squares in 2 ways, for example, as 617124964 + 276676 = 24842^2 + 526^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7717481 + ... + 7717560.

Almost surely, 2^617401640 is an apocalyptic number.

It is an amenable number.

617401640 is an abundant number, since it is smaller than the sum of its proper divisors (771752140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

617401640 is a wasteful number, since it uses less digits than its factorization.

617401640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15435052 (or 15435048 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 617401640 is about 24847.5680902578. The cubic root of 617401640 is about 851.5090333336.

The spelling of 617401640 in words is "six hundred seventeen million, four hundred one thousand, six hundred forty".