164466240435261 has 40 divisors (see below), whose sum is σ = 246485403114104. Its totient is φ = 109286616890880.

The previous prime is 164466240435257. The next prime is 164466240435269. The reversal of 164466240435261 is 162534042664461.

164466240435261 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 6 + 624 + 0 + 4 + 3 + 5 + 2 + 6 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1599893587161 + 162866346848100 = 1264869^2 + 12761910^2 .

It is not a de Polignac number, because 164466240435261 - 2² = 164466240435257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164466240435198 and 164466240435207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164466240435269) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 396846225 + ... + 397260441.

Almost surely, 2^{164466240435261} is an apocalyptic number.

It is an amenable number.

164466240435261 is a deficient number, since it is larger than the sum of its proper divisors (82019162678843).

164466240435261 is a wasteful number, since it uses less digits than its factorization.

164466240435261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430203 (or 430194 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 164466240435261 in words is "one hundred sixty-four trillion, four hundred sixty-six billion, two hundred forty million, four hundred thirty-five thousand, two hundred sixty-one".