161095149090 has 24 divisors (see below), whose sum is σ = 418847387868. Its totient is φ = 42958706400.

The previous prime is 161095149049. The next prime is 161095149151. The reversal of 161095149090 is 90941590161.

161095149090 is a `hidden beast` number, since 1 + 6 + 109 + 51 + 490 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 129688575129 + 31406573961 = 360123^2 + 177219^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 894972961 + ... + 894973140.

Almost surely, 2^161095149090 is an apocalyptic number.

161095149090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161095149090 is an abundant number, since it is smaller than the sum of its proper divisors (257752238778).

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

161095149090 is a wasteful number, since it uses less digits than its factorization.

161095149090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789946114 (or 1789946111 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The spelling of 161095149090 in words is "one hundred sixty-one billion, ninety-five million, one hundred forty-nine thousand, ninety".