164247742461 has 16 divisors (see below), whose sum is σ = 238932523008. Its totient is φ = 99532954800.

The previous prime is 164247742433. The next prime is 164247742469.

164247742461 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 164247742461 - 2⁶ = 164247742397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164247742461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164247742469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26260 + ... + 573746.

It is an arithmetic number, because the mean of its divisors is an integer number (14933282688).

Almost surely, 2^164247742461 is an apocalyptic number.

164247742461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

164247742461 is a deficient number, since it is larger than the sum of its proper divisors (74684780547).

164247742461 is a wasteful number, since it uses less digits than its factorization.

164247742461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556592.

The product of its digits is 1806336, while the sum is 48.

The spelling of 164247742461 in words is "one hundred sixty-four billion, two hundred forty-seven million, seven hundred forty-two thousand, four hundred sixty-one".