161133953140 has 12 divisors (see below), whose sum is σ = 338381301636. Its totient is φ = 64453581248.

The previous prime is 161133953137. The next prime is 161133953207. The reversal of 161133953140 is 41359331161.

It can be written as a sum of positive squares in 2 ways, for example, as 67206414564 + 93927538576 = 259242^2 + 306476^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161133953140.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 4028348809 + ... + 4028348848.

It is an arithmetic number, because the mean of its divisors is an integer number (28198441803).

Almost surely, 2^161133953140 is an apocalyptic number.

161133953140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161133953140 is an abundant number, since it is smaller than the sum of its proper divisors (177247348496).

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

161133953140 is a wasteful number, since it uses less digits than its factorization.

161133953140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056697666 (or 8056697664 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 161133953140 in words is "one hundred sixty-one billion, one hundred thirty-three million, nine hundred fifty-three thousand, one hundred forty".