161406012655 has 12 divisors (see below), whose sum is σ = 196621243560. Its totient is φ = 127197556464.

The previous prime is 161406012619. The next prime is 161406012659. The reversal of 161406012655 is 556210604161.

161406012655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161406012655 - 2⁷ = 161406012527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161406012659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3573145 + ... + 3618034.

It is an arithmetic number, because the mean of its divisors is an integer number (16385103630).

Almost surely, 2^161406012655 is an apocalyptic number.

161406012655 is a deficient number, since it is larger than the sum of its proper divisors (35215230905).

161406012655 is an frugal number, since it uses more digits than its factorization.

161406012655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7191318 (or 7191251 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 161406012655 in words is "one hundred sixty-one billion, four hundred six million, twelve thousand, six hundred fifty-five".