161615853340 has 24 divisors (see below), whose sum is σ = 351096510240. Its totient is φ = 62417156928.

The previous prime is 161615853323. The next prime is 161615853361. The reversal of 161615853340 is 43358516161.

It is a super-2 number, since 2×161615853340² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 139323432 + ... + 139324591.

It is an arithmetic number, because the mean of its divisors is an integer number (14629021260).

Almost surely, 2^161615853340 is an apocalyptic number.

161615853340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161615853340 is an abundant number, since it is smaller than the sum of its proper divisors (189480656900).

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

161615853340 is a wasteful number, since it uses less digits than its factorization.

161615853340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278648061 (or 278648059 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 161615853340 in words is "one hundred sixty-one billion, six hundred fifteen million, eight hundred fifty-three thousand, three hundred forty".