1613221556006 has 4 divisors (see below), whose sum is σ = 2419832334012. Its totient is φ = 806610778002.

The previous prime is 1613221555943. The next prime is 1613221556017. The reversal of 1613221556006 is 6006551223161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403305389000 + ... + 403305389003.

It is an arithmetic number, because the mean of its divisors is an integer number (604958083503).

Almost surely, 2^{1613221556006} is an apocalyptic number.

1613221556006 is a deficient number, since it is larger than the sum of its proper divisors (806610778006).

1613221556006 is an equidigital number, since it uses as much as digits as its factorization.

1613221556006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806610778005.

The product of its (nonzero) digits is 64800, while the sum is 38.

Adding to 1613221556006 its reverse (6006551223161), we get a palindrome (7619772779167).

The spelling of 1613221556006 in words is "one trillion, six hundred thirteen billion, two hundred twenty-one million, five hundred fifty-six thousand, six".