161502015040 has 28 divisors (see below), whose sum is σ = 384576674076. Its totient is φ = 64600805888.

The previous prime is 161502015011. The next prime is 161502015071. The reversal of 161502015040 is 40510205161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70186845184 + 91315169856 = 264928^2 + 302184^2 .

It is a junction number, because it is equal to n+sod(n) for n = 161502014996 and 161502015014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252346579 + ... + 252347218.

It is an arithmetic number, because the mean of its divisors is an integer number (13734881217).

Almost surely, 2^161502015040 is an apocalyptic number.

161502015040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161502015040 is an abundant number, since it is smaller than the sum of its proper divisors (223074659036).

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

161502015040 is an equidigital number, since it uses as much as digits as its factorization.

161502015040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504693814 (or 504693804 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 161502015040 in words is "one hundred sixty-one billion, five hundred two million, fifteen thousand, forty".