167561620 has 24 divisors (see below), whose sum is σ = 358520904. Its totient is φ = 65759616.

The previous prime is 167561591. The next prime is 167561651. The reversal of 167561620 is 26165761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20376196 + 147185424 = 4514^2 + 12132^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77979 + ... + 80098.

It is an arithmetic number, because the mean of its divisors is an integer number (14938371).

Almost surely, 2^167561620 is an apocalyptic number.

167561620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

167561620 is an abundant number, since it is smaller than the sum of its proper divisors (190959284).

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

167561620 is a wasteful number, since it uses less digits than its factorization.

167561620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158139 (or 158137 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 167561620 is about 12944.5594749300. The cubic root of 167561620 is about 551.3044738890.

The spelling of 167561620 in words is "one hundred sixty-seven million, five hundred sixty-one thousand, six hundred twenty".