161980375675 has 24 divisors (see below), whose sum is σ = 201557970000. Its totient is φ = 129131950080.

The previous prime is 161980375673. The next prime is 161980375691. The reversal of 161980375675 is 576573089161.

It is a happy number.

It is not a de Polignac number, because 161980375675 - 2¹ = 161980375673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161980375673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9274351 + ... + 9291799.

It is an arithmetic number, because the mean of its divisors is an integer number (8398248750).

Almost surely, 2^161980375675 is an apocalyptic number.

161980375675 is a deficient number, since it is larger than the sum of its proper divisors (39577594325).

161980375675 is a wasteful number, since it uses less digits than its factorization.

161980375675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18735 (or 18730 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 161980375675 in words is "one hundred sixty-one billion, nine hundred eighty million, three hundred seventy-five thousand, six hundred seventy-five".