216401653553 has 8 divisors (see below), whose sum is σ = 218360851296. Its totient is φ = 214443230400.

The previous prime is 216401653541. The next prime is 216401653597. The reversal of 216401653553 is 355356104612.

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 216401653553 - 2⁴ = 216401653537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216401653553.

It is not an unprimeable number, because it can be changed into a prime (216401653753) 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, 375158 + ... + 757328.

It is an arithmetic number, because the mean of its divisors is an integer number (27295106412).

Almost surely, 2^216401653553 is an apocalyptic number.

It is an amenable number.

216401653553 is a deficient number, since it is larger than the sum of its proper divisors (1959197743).

216401653553 is a wasteful number, since it uses less digits than its factorization.

216401653553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387295.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 216401653553 in words is "two hundred sixteen billion, four hundred one million, six hundred fifty-three thousand, five hundred fifty-three".