64738871161 has 4 divisors (see below), whose sum is σ = 64783612672. Its totient is φ = 64694129652.

The previous prime is 64738871129. The next prime is 64738871179. The reversal of 64738871161 is 16117883746.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64738871161 - 2⁵ = 64738871129 is a prime.

It is a super-2 number, since 2×64738871161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64738871099 and 64738871108.

It is not an unprimeable number, because it can be changed into a prime (64738871191) 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, 22368585 + ... + 22371478.

It is an arithmetic number, because the mean of its divisors is an integer number (16195903168).

Almost surely, 2^64738871161 is an apocalyptic number.

It is an amenable number.

64738871161 is a deficient number, since it is larger than the sum of its proper divisors (44741511).

64738871161 is a wasteful number, since it uses less digits than its factorization.

64738871161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44741510.

The product of its digits is 1354752, while the sum is 52.

The spelling of 64738871161 in words is "sixty-four billion, seven hundred thirty-eight million, eight hundred seventy-one thousand, one hundred sixty-one".