161435017020 has 24 divisors (see below), whose sum is σ = 452018047824. Its totient is φ = 43049337856.

The previous prime is 161435017013. The next prime is 161435017021. The reversal of 161435017020 is 20710534161.

It is a super-2 number, since 2×161435017020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161435017021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1345291749 + ... + 1345291868.

It is an arithmetic number, because the mean of its divisors is an integer number (18834085326).

Almost surely, 2^161435017020 is an apocalyptic number.

161435017020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161435017020 is an abundant number, since it is smaller than the sum of its proper divisors (290583030804).

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

161435017020 is a wasteful number, since it uses less digits than its factorization.

161435017020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690583629 (or 2690583627 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 161435017020 in words is "one hundred sixty-one billion, four hundred thirty-five million, seventeen thousand, twenty".