616656554023 has 4 divisors (see below), whose sum is σ = 616659178168. Its totient is φ = 616653929880.

The previous prime is 616656553949. The next prime is 616656554027. The reversal of 616656554023 is 320455656616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616656554023 - 2³⁷ = 479217600551 is a prime.

It is a super-2 number, since 2×616656554023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616656554027) 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, 920661 + ... + 1442542.

It is an arithmetic number, because the mean of its divisors is an integer number (154164794542).

Almost surely, 2^616656554023 is an apocalyptic number.

616656554023 is a deficient number, since it is larger than the sum of its proper divisors (2624145).

616656554023 is a wasteful number, since it uses less digits than its factorization.

616656554023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624144.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 616656554023 in words is "six hundred sixteen billion, six hundred fifty-six million, five hundred fifty-four thousand, twenty-three".