1616622621663 has 8 divisors (see below), whose sum is σ = 2463424947328. Its totient is φ = 923784355224.

The previous prime is 1616622621623. The next prime is 1616622621667. The reversal of 1616622621663 is 3661262266161.

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

It is not a de Polignac number, because 1616622621663 - 2³⁶ = 1547903144927 is a prime.

It is a super-2 number, since 2×1616622621663² (a number of 25 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 (1616622621667) 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, 38491014781 + ... + 38491014822.

It is an arithmetic number, because the mean of its divisors is an integer number (307928118416).

Almost surely, 2^{1616622621663} is an apocalyptic number.

1616622621663 is a deficient number, since it is larger than the sum of its proper divisors (846802325665).

1616622621663 is an equidigital number, since it uses as much as digits as its factorization.

1616622621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76982029613.

The product of its digits is 1119744, while the sum is 48.

The spelling of 1616622621663 in words is "one trillion, six hundred sixteen billion, six hundred twenty-two million, six hundred twenty-one thousand, six hundred sixty-three".