164878213020154 has 24 divisors (see below), whose sum is σ = 258539692413492. Its totient is φ = 78854209674240.

The previous prime is 164878213019999. The next prime is 164878213020211. The reversal of 164878213020154 is 451020312878461.

It can be written as a sum of positive squares in 2 ways, for example, as 122570694457225 + 42307518562929 = 11071165^2 + 6504423^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163225164 + ... + 164232184.

Almost surely, 2^{164878213020154} is an apocalyptic number.

164878213020154 is a deficient number, since it is larger than the sum of its proper divisors (93661479393338).

164878213020154 is a wasteful number, since it uses less digits than its factorization.

164878213020154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161822 (or 1161799 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 164878213020154 in words is "one hundred sixty-four trillion, eight hundred seventy-eight billion, two hundred thirteen million, twenty thousand, one hundred fifty-four".