6123561663 has 4 divisors (see below), whose sum is σ = 8164748888. Its totient is φ = 4082374440.

The previous prime is 6123561583. The next prime is 6123561727. The reversal of 6123561663 is 3661653216.

It is a happy number.

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

It is not a de Polignac number, because 6123561663 - 2¹² = 6123557567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6123566663) 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, 1020593608 + ... + 1020593613.

It is an arithmetic number, because the mean of its divisors is an integer number (2041187222).

Almost surely, 2^6123561663 is an apocalyptic number.

6123561663 is a deficient number, since it is larger than the sum of its proper divisors (2041187225).

6123561663 is a wasteful number, since it uses less digits than its factorization.

6123561663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041187224.

The product of its digits is 116640, while the sum is 39.

The square root of 6123561663 is about 78253.1894749345. The cubic root of 6123561663 is about 1829.5096243490.

The spelling of 6123561663 in words is "six billion, one hundred twenty-three million, five hundred sixty-one thousand, six hundred sixty-three".