616645136660541 has 16 divisors (see below), whose sum is σ = 876323123710848. Its totient is φ = 384352247232000.

The previous prime is 616645136660491. The next prime is 616645136660591. The reversal of 616645136660541 is 145066631546616.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (616645136660491) and next prime (616645136660591).

It is not a de Polignac number, because 616645136660541 - 2⁹ = 616645136660029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616645136660591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40036684720 + ... + 40036700121.

It is an arithmetic number, because the mean of its divisors is an integer number (54770195231928).

Almost surely, 2^{616645136660541} is an apocalyptic number.

It is an amenable number.

616645136660541 is a deficient number, since it is larger than the sum of its proper divisors (259677987050307).

616645136660541 is a wasteful number, since it uses less digits than its factorization.

616645136660541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80073385012.

The product of its (nonzero) digits is 55987200, while the sum is 60.

The spelling of 616645136660541 in words is "six hundred sixteen trillion, six hundred forty-five billion, one hundred thirty-six million, six hundred sixty thousand, five hundred forty-one".