613646614221621 has 8 divisors (see below), whose sum is σ = 818196072980544. Its totient is φ = 409097449138560.

The previous prime is 613646614221587. The next prime is 613646614221623. The reversal of 613646614221621 is 126122416646316.

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

It is not a de Polignac number, because 613646614221621 - 2⁷ = 613646614221493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613646614221623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68496225 + ... + 76935206.

It is an arithmetic number, because the mean of its divisors is an integer number (102274509122568).

Almost surely, 2^{613646614221621} is an apocalyptic number.

It is an amenable number.

613646614221621 is a deficient number, since it is larger than the sum of its proper divisors (204549458758923).

613646614221621 is a wasteful number, since it uses less digits than its factorization.

613646614221621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146837931.

The product of its digits is 2985984, while the sum is 51.

The spelling of 613646614221621 in words is "six hundred thirteen trillion, six hundred forty-six billion, six hundred fourteen million, two hundred twenty-one thousand, six hundred twenty-one".