161587982835 has 32 divisors (see below), whose sum is σ = 287445130560. Its totient is φ = 86126976000.

The previous prime is 161587982797. The next prime is 161587982839. The reversal of 161587982835 is 538289785161.

161587982835 is a `hidden beast` number, since 1 + 615 + 8 + 7 + 9 + 8 + 2 + 8 + 3 + 5 = 666.

It is not a de Polignac number, because 161587982835 - 2⁷ = 161587982707 is a prime.

It is a super-2 number, since 2×161587982835² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161587982839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150366 + ... + 588035.

It is an arithmetic number, because the mean of its divisors is an integer number (8982660330).

Almost surely, 2^161587982835 is an apocalyptic number.

161587982835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161587982835 is a deficient number, since it is larger than the sum of its proper divisors (125857147725).

161587982835 is a wasteful number, since it uses less digits than its factorization.

161587982835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740036 (or 740030 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 63.

The spelling of 161587982835 in words is "one hundred sixty-one billion, five hundred eighty-seven million, nine hundred eighty-two thousand, eight hundred thirty-five".