161211411465 has 16 divisors (see below), whose sum is σ = 277779663168. Its totient is φ = 79365617856.

The previous prime is 161211411463. The next prime is 161211411509. The reversal of 161211411465 is 564114112161.

It is a happy number.

It is not a de Polignac number, because 161211411465 - 2¹ = 161211411463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161211411461) 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 15 ways as a sum of consecutive naturals, for example, 413362399 + ... + 413362788.

It is an arithmetic number, because the mean of its divisors is an integer number (17361228948).

Almost surely, 2^161211411465 is an apocalyptic number.

161211411465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161211411465 is a deficient number, since it is larger than the sum of its proper divisors (116568251703).

161211411465 is a wasteful number, since it uses less digits than its factorization.

161211411465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826725208.

The product of its digits is 5760, while the sum is 33.

The spelling of 161211411465 in words is "one hundred sixty-one billion, two hundred eleven million, four hundred eleven thousand, four hundred sixty-five".