64580494020 has 96 divisors (see below), whose sum is σ = 206995531008. Its totient is φ = 14737116672.

The previous prime is 64580494001. The next prime is 64580494091. The reversal of 64580494020 is 2049408546.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132042 + ... + 382878.

It is an arithmetic number, because the mean of its divisors is an integer number (2156203448).

Almost surely, 2^64580494020 is an apocalyptic number.

64580494020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64580494020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103497765504).

64580494020 is an abundant number, since it is smaller than the sum of its proper divisors (142415036988).

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

64580494020 is a wasteful number, since it uses less digits than its factorization.

64580494020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251469 (or 251467 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 64580494020 in words is "sixty-four billion, five hundred eighty million, four hundred ninety-four thousand, twenty".