1621554730113 has 8 divisors (see below), whose sum is σ = 2171352257568. Its totient is φ = 1076396844704.

The previous prime is 1621554730111. The next prime is 1621554730153. The reversal of 1621554730113 is 3110374551261.

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

It is a cyclic number.

It is not a de Polignac number, because 1621554730113 - 2¹ = 1621554730111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1621554730111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159909695 + ... + 1159911092.

It is an arithmetic number, because the mean of its divisors is an integer number (271419032196).

Almost surely, 2^{1621554730113} is an apocalyptic number.

It is an amenable number.

1621554730113 is a deficient number, since it is larger than the sum of its proper divisors (549797527455).

1621554730113 is a wasteful number, since it uses less digits than its factorization.

1621554730113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319821023.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 1621554730113 in words is "one trillion, six hundred twenty-one billion, five hundred fifty-four million, seven hundred thirty thousand, one hundred thirteen".