161154449613 has 8 divisors (see below), whose sum is σ = 238747332800. Its totient is φ = 107436299724.

The previous prime is 161154449581. The next prime is 161154449633. The reversal of 161154449613 is 316944451161.

It is a happy number.

161154449613 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 544 + 4 + 96 + 13 = 666.

It is not a de Polignac number, because 161154449613 - 2⁵ = 161154449581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161154449633) 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 7 ways as a sum of consecutive naturals, for example, 2984341633 + ... + 2984341686.

It is an arithmetic number, because the mean of its divisors is an integer number (29843416600).

Almost surely, 2^161154449613 is an apocalyptic number.

It is an amenable number.

161154449613 is a deficient number, since it is larger than the sum of its proper divisors (77592883187).

161154449613 is an equidigital number, since it uses as much as digits as its factorization.

161154449613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968683328 (or 5968683322 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 161154449613 in words is "one hundred sixty-one billion, one hundred fifty-four million, four hundred forty-nine thousand, six hundred thirteen".