161330308783 has 6 divisors (see below), whose sum is σ = 184378710264. Its totient is φ = 138282210936.

The previous prime is 161330308781. The next prime is 161330308787. The reversal of 161330308783 is 387803033161.

It is not a de Polignac number, because 161330308783 - 2¹ = 161330308781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161330308781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 986785 + ... + 1138597.

It is an arithmetic number, because the mean of its divisors is an integer number (30729785044).

Almost surely, 2^161330308783 is an apocalyptic number.

161330308783 is a deficient number, since it is larger than the sum of its proper divisors (23048401481).

161330308783 is an frugal number, since it uses more digits than its factorization.

161330308783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303633 (or 151820 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 161330308783 in words is "one hundred sixty-one billion, three hundred thirty million, three hundred eight thousand, seven hundred eighty-three".