642486127800 has 192 divisors, whose sum is σ = 2178699840000. Its totient is φ = 155329228800.

The previous prime is 642486127799. The next prime is 642486127807. The reversal of 642486127800 is 8721684246.

It is a self number, because there is not a number n which added to its sum of digits gives 642486127800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642486127807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2289576 + ... + 2554824.

It is an arithmetic number, because the mean of its divisors is an integer number (11347395000).

Almost surely, 2^642486127800 is an apocalyptic number.

642486127800 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 642486127800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089349920000).

642486127800 is an abundant number, since it is smaller than the sum of its proper divisors (1536213712200).

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

642486127800 is a wasteful number, since it uses less digits than its factorization.

642486127800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265646 (or 265637 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 642486127800 in words is "six hundred forty-two billion, four hundred eighty-six million, one hundred twenty-seven thousand, eight hundred".