613440415969 has 4 divisors (see below), whose sum is σ = 613459288260. Its totient is φ = 613421543680.

The previous prime is 613440415897. The next prime is 613440415979. The reversal of 613440415969 is 969514044316.

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 461115693025 + 152324722944 = 679055^2 + 390288^2 .

It is a cyclic number.

It is not a de Polignac number, because 613440415969 - 2¹¹ = 613440413921 is a prime.

It is a super-2 number, since 2×613440415969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613440415979) 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, 9387304 + ... + 9452425.

It is an arithmetic number, because the mean of its divisors is an integer number (153364822065).

Almost surely, 2^613440415969 is an apocalyptic number.

It is an amenable number.

613440415969 is a deficient number, since it is larger than the sum of its proper divisors (18872291).

613440415969 is a wasteful number, since it uses less digits than its factorization.

613440415969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18872290.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 613440415969 in words is "six hundred thirteen billion, four hundred forty million, four hundred fifteen thousand, nine hundred sixty-nine".