64927963800 has 480 divisors, whose sum is σ = 260176561920. Its totient is φ = 14699232000.

The previous prime is 64927963757. The next prime is 64927963823. The reversal of 64927963800 is 836972946.

It is a happy number.

64927963800 is a `hidden beast` number, since 6 + 492 + 79 + 6 + 3 + 80 + 0 = 666.

It is a super-2 number, since 2×64927963800² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12131125 + ... + 12136475.

It is an arithmetic number, because the mean of its divisors is an integer number (542034504).

Almost surely, 2^64927963800 is an apocalyptic number.

64927963800 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 64927963800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130088280960).

64927963800 is an abundant number, since it is smaller than the sum of its proper divisors (195248598120).

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

64927963800 is a wasteful number, since it uses less digits than its factorization.

64927963800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493 (or 5475 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 64927963800 in words is "sixty-four billion, nine hundred twenty-seven million, nine hundred sixty-three thousand, eight hundred".