164420661147505 has 32 divisors (see below), whose sum is σ = 226809379203840. Its totient is φ = 112086827612160.

The previous prime is 164420661147493. The next prime is 164420661147517. The reversal of 164420661147505 is 505741166024461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (164420661147493) and next prime (164420661147517).

It is not a de Polignac number, because 164420661147505 - 2⁴¹ = 162221637891953 is a prime.

It is a super-3 number, since 3×164420661147505³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20933337 + ... + 27695593.

It is an arithmetic number, because the mean of its divisors is an integer number (7087793100120).

Almost surely, 2^{164420661147505} is an apocalyptic number.

It is an amenable number.

164420661147505 is a deficient number, since it is larger than the sum of its proper divisors (62388718056335).

164420661147505 is a wasteful number, since it uses less digits than its factorization.

164420661147505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766329.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 164420661147505 in words is "one hundred sixty-four trillion, four hundred twenty billion, six hundred sixty-one million, one hundred forty-seven thousand, five hundred five".