164021060656 has 20 divisors (see below), whose sum is σ = 318020964304. Its totient is φ = 81951134400.

The previous prime is 164021060639. The next prime is 164021060659. The reversal of 164021060656 is 656060120461.

It is not an unprimeable number, because it can be changed into a prime (164021060659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3689460 + ... + 3733651.

Almost surely, 2^164021060656 is an apocalyptic number.

164021060656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164021060656 is a deficient number, since it is larger than the sum of its proper divisors (153999903648).

164021060656 is a wasteful number, since it uses less digits than its factorization.

164021060656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424500 (or 7424494 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 164021060656 in words is "one hundred sixty-four billion, twenty-one million, sixty thousand, six hundred fifty-six".