640236227030400 has 3456 divisors, whose sum is σ = 3068289024255360. Its totient is φ = 115576189747200.

The previous prime is 640236227030371. The next prime is 640236227030489. The reversal of 640236227030400 is 4030722632046.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 14866029667 + ... + 14866072733.

It is an arithmetic number, because the mean of its divisors is an integer number (887815111185).

Almost surely, 2^{640236227030400} is an apocalyptic number.

640236227030400 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 640236227030400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1534144512127680).

640236227030400 is an abundant number, since it is smaller than the sum of its proper divisors (2428052797224960).

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

640236227030400 is a wasteful number, since it uses less digits than its factorization.

640236227030400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43162 (or 43125 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 39.

Adding to 640236227030400 its reverse (4030722632046), we get a palindrome (644266949662446).

The spelling of 640236227030400 in words is "six hundred forty trillion, two hundred thirty-six billion, two hundred twenty-seven million, thirty thousand, four hundred".