164332767947 has 4 divisors (see below), whose sum is σ = 164334550896. Its totient is φ = 164330985000.

The previous prime is 164332767943. The next prime is 164332767971. The reversal of 164332767947 is 749767233461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164332767947 - 2² = 164332767943 is a prime.

It is a super-2 number, since 2×164332767947² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164332767941) 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, 745223 + ... + 940224.

It is an arithmetic number, because the mean of its divisors is an integer number (41083637724).

Almost surely, 2^164332767947 is an apocalyptic number.

164332767947 is a deficient number, since it is larger than the sum of its proper divisors (1782949).

164332767947 is an equidigital number, since it uses as much as digits as its factorization.

164332767947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782948.

The product of its digits is 32006016, while the sum is 59.

The spelling of 164332767947 in words is "one hundred sixty-four billion, three hundred thirty-two million, seven hundred sixty-seven thousand, nine hundred forty-seven".