164240431204551 has 32 divisors (see below), whose sum is σ = 236307370521600. Its totient is φ = 100867492214784.

The previous prime is 164240431204541. The next prime is 164240431204613. The reversal of 164240431204551 is 155402134042461.

It is not a de Polignac number, because 164240431204551 - 2⁹ = 164240431204039 is a prime.

It is a super-2 number, since 2×164240431204551² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164240431204501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990516750 + ... + 990682548.

It is an arithmetic number, because the mean of its divisors is an integer number (7384605328800).

Almost surely, 2^{164240431204551} is an apocalyptic number.

164240431204551 is a deficient number, since it is larger than the sum of its proper divisors (72066939317049).

164240431204551 is a wasteful number, since it uses less digits than its factorization.

164240431204551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216815.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 164240431204551 in words is "one hundred sixty-four trillion, two hundred forty billion, four hundred thirty-one million, two hundred four thousand, five hundred fifty-one".