161687201094 has 48 divisors (see below), whose sum is σ = 356198384880. Its totient is φ = 52992377280.

The previous prime is 161687201089. The next prime is 161687201099. The reversal of 161687201094 is 490102786161.

161687201094 is a `hidden beast` number, since 1 + 616 + 8 + 7 + 20 + 1 + 0 + 9 + 4 = 666.

161687201094 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161687201089) and next prime (161687201099).

It is a super-2 number, since 2×161687201094² (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 (161687201099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3069144 + ... + 3121380.

It is an arithmetic number, because the mean of its divisors is an integer number (7420799685).

Almost surely, 2^161687201094 is an apocalyptic number.

161687201094 is an abundant number, since it is smaller than the sum of its proper divisors (194511183786).

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

161687201094 is a wasteful number, since it uses less digits than its factorization.

161687201094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55125 (or 55122 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 161687201094 in words is "one hundred sixty-one billion, six hundred eighty-seven million, two hundred one thousand, ninety-four".