161536193802 has 24 divisors (see below), whose sum is σ = 365212265184. Its totient is φ = 51504293544.

The previous prime is 161536193759. The next prime is 161536193827. The reversal of 161536193802 is 208391635161.

161536193802 is a `hidden beast` number, since 16 + 15 + 3 + 619 + 3 + 8 + 0 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195091608 + ... + 195092435.

It is an arithmetic number, because the mean of its divisors is an integer number (15217177716).

Almost surely, 2^161536193802 is an apocalyptic number.

161536193802 is an abundant number, since it is smaller than the sum of its proper divisors (203676071382).

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

161536193802 is a wasteful number, since it uses less digits than its factorization.

161536193802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390184074 (or 390184071 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 161536193802 in words is "one hundred sixty-one billion, five hundred thirty-six million, one hundred ninety-three thousand, eight hundred two".