64506461161 has 8 divisors (see below), whose sum is σ = 66697362144. Its totient is φ = 62344968480.

The previous prime is 64506461143. The next prime is 64506461171. The reversal of 64506461161 is 16116460546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64506461161 is a prime.

It is a super-2 number, since 2×64506461161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64506461171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7347615 + ... + 7356388.

It is an arithmetic number, because the mean of its divisors is an integer number (8337170268).

Almost surely, 2^64506461161 is an apocalyptic number.

It is an amenable number.

64506461161 is a deficient number, since it is larger than the sum of its proper divisors (2190900983).

64506461161 is a wasteful number, since it uses less digits than its factorization.

64506461161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14704151.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 64506461161 in words is "sixty-four billion, five hundred six million, four hundred sixty-one thousand, one hundred sixty-one".