161403270040 has 64 divisors (see below), whose sum is σ = 380646604800. Its totient is φ = 61477291392.

The previous prime is 161403270037. The next prime is 161403270047. The reversal of 161403270040 is 40072304161.

It is a junction number, because it is equal to n+sod(n) for n = 161403269990 and 161403270008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161403270047) 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 15 ways as a sum of consecutive naturals, for example, 188200 + ... + 598519.

It is an arithmetic number, because the mean of its divisors is an integer number (5947603200).

Almost surely, 2^161403270040 is an apocalyptic number.

161403270040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161403270040 is an abundant number, since it is smaller than the sum of its proper divisors (219243334760).

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

161403270040 is a wasteful number, since it uses less digits than its factorization.

161403270040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786976 (or 786972 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 161403270040 in words is "one hundred sixty-one billion, four hundred three million, two hundred seventy thousand, forty".