161562231654 has 16 divisors (see below), whose sum is σ = 325264362240. Its totient is φ = 53497427400.

The previous prime is 161562231653. The next prime is 161562231659. The reversal of 161562231654 is 456132265161.

161562231654 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161562231654² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161562231653) 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 7 ways as a sum of consecutive naturals, for example, 89161474 + ... + 89163285.

It is an arithmetic number, because the mean of its divisors is an integer number (20329022640).

Almost surely, 2^161562231654 is an apocalyptic number.

161562231654 is an abundant number, since it is smaller than the sum of its proper divisors (163702130586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161562231654 is a wasteful number, since it uses less digits than its factorization.

161562231654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178324915.

The product of its digits is 259200, while the sum is 42.

The spelling of 161562231654 in words is "one hundred sixty-one billion, five hundred sixty-two million, two hundred thirty-one thousand, six hundred fifty-four".