64161020613 has 8 divisors (see below), whose sum is σ = 85552992288. Its totient is φ = 42771531344.

The previous prime is 64161020579. The next prime is 64161020621. The reversal of 64161020613 is 31602016146.

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

It is a cyclic number.

It is not a de Polignac number, because 64161020613 - 2²¹ = 64158923461 is a prime.

It is a super-2 number, since 2×64161020613² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64161020113) 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, 559431 + ... + 664292.

It is an arithmetic number, because the mean of its divisors is an integer number (10694124036).

Almost surely, 2^64161020613 is an apocalyptic number.

It is an amenable number.

64161020613 is a deficient number, since it is larger than the sum of its proper divisors (21391971675).

64161020613 is a wasteful number, since it uses less digits than its factorization.

64161020613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241203.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 64161020613 its reverse (31602016146), we get a palindrome (95763036759).

The spelling of 64161020613 in words is "sixty-four billion, one hundred sixty-one million, twenty thousand, six hundred thirteen".