164623554 has 12 divisors (see below), whose sum is σ = 356684406. Its totient is φ = 54874512.

The previous prime is 164623549. The next prime is 164623559. The reversal of 164623554 is 455326461.

164623554 is a `hidden beast` number, since 1 + 646 + 2 + 3 + 5 + 5 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (164623549) and next prime (164623559).

It can be written as a sum of positive squares in only one way, i.e., 130576329 + 34047225 = 11427^2 + 5835^2 .

It is not an unprimeable number, because it can be changed into a prime (164623559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4572859 + ... + 4572894.

Almost surely, 2^164623554 is an apocalyptic number.

164623554 is an abundant number, since it is smaller than the sum of its proper divisors (192060852).

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

164623554 is a wasteful number, since it uses less digits than its factorization.

164623554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145761 (or 9145758 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 164623554 is about 12830.5710706889. The cubic root of 164623554 is about 548.0632197474.

It can be divided in two parts, 1646 and 23554, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 164623554 in words is "one hundred sixty-four million, six hundred twenty-three thousand, five hundred fifty-four".