2161101466505 has 16 divisors (see below), whose sum is σ = 2596513860864. Its totient is φ = 1726754057280.

The previous prime is 2161101466487. The next prime is 2161101466553. The reversal of 2161101466505 is 5056641011612.

It is not a de Polignac number, because 2161101466505 - 2¹² = 2161101462409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18848300 + ... + 18962610.

It is an arithmetic number, because the mean of its divisors is an integer number (162282116304).

Almost surely, 2^{2161101466505} is an apocalyptic number.

It is an amenable number.

2161101466505 is a deficient number, since it is larger than the sum of its proper divisors (435412394359).

2161101466505 is a wasteful number, since it uses less digits than its factorization.

2161101466505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118936.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 2161101466505 in words is "two trillion, one hundred sixty-one billion, one hundred one million, four hundred sixty-six thousand, five hundred five".