64606042020 has 96 divisors (see below), whose sum is σ = 194999898240. Its totient is φ = 15887692800.

The previous prime is 64606041977. The next prime is 64606042069. The reversal of 64606042020 is 2024060646.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 780376 + ... + 859184.

It is an arithmetic number, because the mean of its divisors is an integer number (2031248940).

Almost surely, 2^64606042020 is an apocalyptic number.

64606042020 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 64606042020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97499949120).

64606042020 is an abundant number, since it is smaller than the sum of its proper divisors (130393856220).

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

64606042020 is a wasteful number, since it uses less digits than its factorization.

64606042020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79885 (or 79883 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 64606042020 in words is "sixty-four billion, six hundred six million, forty-two thousand, twenty".