161346180501 has 16 divisors (see below), whose sum is σ = 260761504320. Its totient is φ = 97785563760.

The previous prime is 161346180493. The next prime is 161346180517. The reversal of 161346180501 is 105081643161.

It is a happy number.

161346180501 is a `hidden beast` number, since 1 + 6 + 1 + 34 + 618 + 0 + 5 + 0 + 1 = 666.

It is not a de Polignac number, because 161346180501 - 2³ = 161346180493 is a prime.

It is a super-2 number, since 2×161346180501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161346184501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271626270 + ... + 271626863.

It is an arithmetic number, because the mean of its divisors is an integer number (16297594020).

Almost surely, 2^161346180501 is an apocalyptic number.

161346180501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161346180501 is a deficient number, since it is larger than the sum of its proper divisors (99415323819).

161346180501 is a wasteful number, since it uses less digits than its factorization.

161346180501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543253153 (or 543253147 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 161346180501 in words is "one hundred sixty-one billion, three hundred forty-six million, one hundred eighty thousand, five hundred one".