64346120540 has 24 divisors (see below), whose sum is σ = 145521227040. Its totient is φ = 23758567488.

The previous prime is 64346120533. The next prime is 64346120557. The reversal of 64346120540 is 4502164346.

It is a self number, because there is not a number n which added to its sum of digits gives 64346120540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123742280 + ... + 123742799.

It is an arithmetic number, because the mean of its divisors is an integer number (6063384460).

Almost surely, 2^64346120540 is an apocalyptic number.

It is an amenable number.

64346120540 is an abundant number, since it is smaller than the sum of its proper divisors (81175106500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64346120540 is a wasteful number, since it uses less digits than its factorization.

64346120540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247485101 (or 247485099 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 64346120540 its reverse (4502164346), we get a palindrome (68848284886).

The spelling of 64346120540 in words is "sixty-four billion, three hundred forty-six million, one hundred twenty thousand, five hundred forty".