64509174420 has 48 divisors (see below), whose sum is σ = 181925177280. Its totient is φ = 17078685696.

The previous prime is 64509174419. The next prime is 64509174449. The reversal of 64509174420 is 2447190546.

It is a super-2 number, since 2×64509174420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859117 + ... + 3875796.

It is an arithmetic number, because the mean of its divisors is an integer number (3790107860).

Almost surely, 2^64509174420 is an apocalyptic number.

64509174420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64509174420 is an abundant number, since it is smaller than the sum of its proper divisors (117416002860).

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

64509174420 is a wasteful number, since it uses less digits than its factorization.

64509174420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735064 (or 7735062 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 64509174420 in words is "sixty-four billion, five hundred nine million, one hundred seventy-four thousand, four hundred twenty".