16115571534401 has 8 divisors (see below), whose sum is σ = 16635776006400. Its totient is φ = 15595388770320.

The previous prime is 16115571534383. The next prime is 16115571534527. The reversal of 16115571534401 is 10443517551161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16115571534401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16115571534901) 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, 3911531 + ... + 6894288.

It is an arithmetic number, because the mean of its divisors is an integer number (2079472000800).

Almost surely, 2^{16115571534401} is an apocalyptic number.

It is an amenable number.

16115571534401 is a deficient number, since it is larger than the sum of its proper divisors (520204471999).

16115571534401 is a wasteful number, since it uses less digits than its factorization.

16115571534401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10853959.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 16115571534401 in words is "sixteen trillion, one hundred fifteen billion, five hundred seventy-one million, five hundred thirty-four thousand, four hundred one".