161012853640 has 32 divisors (see below), whose sum is σ = 367686074880. Its totient is φ = 63443869632.

The previous prime is 161012853629. The next prime is 161012853649. The reversal of 161012853640 is 46358210161.

It is a happy number.

161012853640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161012853640² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161012853640.

It is not an unprimeable number, because it can be changed into a prime (161012853649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30037032 + ... + 30042391.

It is an arithmetic number, because the mean of its divisors is an integer number (11490189840).

Almost surely, 2^161012853640 is an apocalyptic number.

161012853640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161012853640 is an abundant number, since it is smaller than the sum of its proper divisors (206673221240).

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

161012853640 is a wasteful number, since it uses less digits than its factorization.

161012853640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60079501 (or 60079497 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 161012853640 in words is "one hundred sixty-one billion, twelve million, eight hundred fifty-three thousand, six hundred forty".