617958140609 has 4 divisors (see below), whose sum is σ = 617974377300. Its totient is φ = 617941903920.

The previous prime is 617958140599. The next prime is 617958140633. The reversal of 617958140609 is 906041859716.

617958140609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 548984674225 + 68973466384 = 740935^2 + 262628^2 .

It is a cyclic number.

It is not a de Polignac number, because 617958140609 - 2¹² = 617958136513 is a prime.

It is a super-2 number, since 2×617958140609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (617958140699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8061122 + ... + 8137419.

It is an arithmetic number, because the mean of its divisors is an integer number (154493594325).

Almost surely, 2^617958140609 is an apocalyptic number.

It is an amenable number.

617958140609 is a deficient number, since it is larger than the sum of its proper divisors (16236691).

617958140609 is a wasteful number, since it uses less digits than its factorization.

617958140609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16236690.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 617958140609 in words is "six hundred seventeen billion, nine hundred fifty-eight million, one hundred forty thousand, six hundred nine".