616321323066641 has 4 divisors (see below), whose sum is σ = 643117902330432. Its totient is φ = 589524743802852.

The previous prime is 616321323066611. The next prime is 616321323066649. The reversal of 616321323066641 is 146660323123616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 616321323066641 - 2⁶ = 616321323066577 is a prime.

It is a super-2 number, since 2×616321323066641² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 616321323066641.

It is not an unprimeable number, because it can be changed into a prime (616321323066649) 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, 13398289631861 + ... + 13398289631906.

It is an arithmetic number, because the mean of its divisors is an integer number (160779475582608).

Almost surely, 2^{616321323066641} is an apocalyptic number.

It is an amenable number.

616321323066641 is a deficient number, since it is larger than the sum of its proper divisors (26796579263791).

616321323066641 is a wasteful number, since it uses less digits than its factorization.

616321323066641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26796579263790.

The product of its (nonzero) digits is 3359232, while the sum is 50.

The spelling of 616321323066641 in words is "six hundred sixteen trillion, three hundred twenty-one billion, three hundred twenty-three million, sixty-six thousand, six hundred forty-one".