612615504065 has 4 divisors (see below), whose sum is σ = 735138604884. Its totient is φ = 490092403248.

The previous prime is 612615504029. The next prime is 612615504089. The reversal of 612615504065 is 560405516216.

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 356178595249 + 256436908816 = 596807^2 + 506396^2 .

It is a cyclic number.

It is not a de Polignac number, because 612615504065 - 2¹⁰ = 612615503041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61261550402 + ... + 61261550411.

It is an arithmetic number, because the mean of its divisors is an integer number (183784651221).

Almost surely, 2^612615504065 is an apocalyptic number.

It is an amenable number.

612615504065 is a deficient number, since it is larger than the sum of its proper divisors (122523100819).

612615504065 is a wasteful number, since it uses less digits than its factorization.

612615504065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122523100818.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 612615504065 in words is "six hundred twelve billion, six hundred fifteen million, five hundred four thousand, sixty-five".