161445113453 has 16 divisors (see below), whose sum is σ = 176705061120. Its totient is φ = 146597242176.

The previous prime is 161445113429. The next prime is 161445113507. The reversal of 161445113453 is 354311544161.

It is a cyclic number.

It is not a de Polignac number, because 161445113453 - 2¹⁶ = 161445047917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161445113153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497351 + ... + 755147.

It is an arithmetic number, because the mean of its divisors is an integer number (11044066320).

Almost surely, 2^161445113453 is an apocalyptic number.

161445113453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161445113453 is a deficient number, since it is larger than the sum of its proper divisors (15259947667).

161445113453 is a wasteful number, since it uses less digits than its factorization.

161445113453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258596.

The product of its digits is 86400, while the sum is 38.

The spelling of 161445113453 in words is "one hundred sixty-one billion, four hundred forty-five million, one hundred thirteen thousand, four hundred fifty-three".