613409815 has 8 divisors (see below), whose sum is σ = 754045488. Its totient is φ = 478758720.

The previous prime is 613409789. The next prime is 613409879. The reversal of 613409815 is 518904316.

613409815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-613409815 is a prime.

It is a super-2 number, since 2×613409815² = 752543202276668450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495917 + ... + 1496326.

It is an arithmetic number, because the mean of its divisors is an integer number (94255686).

Almost surely, 2^613409815 is an apocalyptic number.

613409815 is a deficient number, since it is larger than the sum of its proper divisors (140635673).

613409815 is a wasteful number, since it uses less digits than its factorization.

613409815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992289.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 613409815 is about 24767.1115594855. Note that the first 3 decimals coincide. The cubic root of 613409815 is about 849.6699133542.

The spelling of 613409815 in words is "six hundred thirteen million, four hundred nine thousand, eight hundred fifteen".