164404136423655 has 16 divisors (see below), whose sum is σ = 292274020308960. Its totient is φ = 87682206092544.

The previous prime is 164404136423587. The next prime is 164404136423671. The reversal of 164404136423655 is 556324631404461.

164404136423655 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 0 + 41 + 364 + 236 + 5 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-164404136423655 is a prime.

It is a super-3 number, since 3×164404136423655³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608904208842 + ... + 608904209111.

It is an arithmetic number, because the mean of its divisors is an integer number (18267126269310).

Almost surely, 2^{164404136423655} is an apocalyptic number.

164404136423655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164404136423655 is a deficient number, since it is larger than the sum of its proper divisors (127869883885305).

164404136423655 is a wasteful number, since it uses less digits than its factorization.

164404136423655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217808417967 (or 1217808417961 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 164404136423655 in words is "one hundred sixty-four trillion, four hundred four billion, one hundred thirty-six million, four hundred twenty-three thousand, six hundred fifty-five".