641496441600 has 1296 divisors, whose sum is σ = 2865796577280. Its totient is φ = 133506662400.

The previous prime is 641496441581. The next prime is 641496441623. The reversal of 641496441600 is 6144694146.

641496441600 is a `hidden beast` number, since 6 + 4 + 149 + 6 + 441 + 60 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 212484891 + ... + 212487909.

Almost surely, 2^641496441600 is an apocalyptic number.

641496441600 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 641496441600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432898288640).

641496441600 is an abundant number, since it is smaller than the sum of its proper divisors (2224300135680).

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

641496441600 is a wasteful number, since it uses less digits than its factorization.

641496441600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106 (or 3084 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 641496441600 in words is "six hundred forty-one billion, four hundred ninety-six million, four hundred forty-one thousand, six hundred".