64555341520 has 160 divisors (see below), whose sum is σ = 157487027328. Its totient is φ = 24585099264.

The previous prime is 64555341503. The next prime is 64555341523. The reversal of 64555341520 is 2514355546.

64555341520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×64555341520³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64555341523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32325162 + ... + 32327158.

Almost surely, 2^64555341520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64555341520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78743513664).

64555341520 is an abundant number, since it is smaller than the sum of its proper divisors (92931685808).

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

64555341520 is a wasteful number, since it uses less digits than its factorization.

64555341520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 64555341520 in words is "sixty-four billion, five hundred fifty-five million, three hundred forty-one thousand, five hundred twenty".