161445103365 has 64 divisors (see below), whose sum is σ = 317983873536. Its totient is φ = 68113170432.

The previous prime is 161445103363. The next prime is 161445103397. The reversal of 161445103365 is 563301544161.

It is not a de Polignac number, because 161445103365 - 2¹ = 161445103363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161445103361) 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 63 ways as a sum of consecutive naturals, for example, 10935829 + ... + 10950581.

It is an arithmetic number, because the mean of its divisors is an integer number (4968498024).

Almost surely, 2^161445103365 is an apocalyptic number.

161445103365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161445103365 is a deficient number, since it is larger than the sum of its proper divisors (156538770171).

161445103365 is a wasteful number, since it uses less digits than its factorization.

161445103365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22798.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 161445103365 in words is "one hundred sixty-one billion, four hundred forty-five million, one hundred three thousand, three hundred sixty-five".