2016621143553 has 8 divisors (see below), whose sum is σ = 2688880980928. Its totient is φ = 1344387700944.

The previous prime is 2016621143539. The next prime is 2016621143557. The reversal of 2016621143553 is 3553411266102.

It is a happy number.

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

It is not a de Polignac number, because 2016621143553 - 2¹² = 2016621139457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2016621143557) 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, 6419725 + ... + 6726522.

It is an arithmetic number, because the mean of its divisors is an integer number (336110122616).

Almost surely, 2^{2016621143553} is an apocalyptic number.

It is an amenable number.

2016621143553 is a deficient number, since it is larger than the sum of its proper divisors (672259837375).

2016621143553 is a wasteful number, since it uses less digits than its factorization.

2016621143553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13197383.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 2016621143553 in words is "two trillion, sixteen billion, six hundred twenty-one million, one hundred forty-three thousand, five hundred fifty-three".