64227698820 has 96 divisors (see below), whose sum is σ = 200089693440. Its totient is φ = 17104227840.

The previous prime is 64227698809. The next prime is 64227698831. The reversal of 64227698820 is 2889672246.

It is an interprime number because it is at equal distance from previous prime (64227698809) and next prime (64227698831).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 321180 + ... + 481260.

It is an arithmetic number, because the mean of its divisors is an integer number (2084267640).

Almost surely, 2^64227698820 is an apocalyptic number.

64227698820 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 64227698820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100044846720).

64227698820 is an abundant number, since it is smaller than the sum of its proper divisors (135861994620).

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

64227698820 is a wasteful number, since it uses less digits than its factorization.

64227698820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160842 (or 160834 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 64227698820 in words is "sixty-four billion, two hundred twenty-seven million, six hundred ninety-eight thousand, eight hundred twenty".