641448687402 has 192 divisors, whose sum is σ = 1490347622400. Its totient is φ = 199086750720.

The previous prime is 641448687401. The next prime is 641448687443. The reversal of 641448687402 is 204786844146.

641448687402 is a `hidden beast` number, since 6 + 41 + 4 + 486 + 87 + 40 + 2 = 666.

It is a super-2 number, since 2×641448687402² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641448687401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 286487799 + ... + 286490037.

It is an arithmetic number, because the mean of its divisors is an integer number (7762227200).

Almost surely, 2^641448687402 is an apocalyptic number.

641448687402 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 641448687402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745173811200).

641448687402 is an abundant number, since it is smaller than the sum of its proper divisors (848898934998).

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

641448687402 is a wasteful number, since it uses less digits than its factorization.

641448687402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521 (or 2518 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 54.

The spelling of 641448687402 in words is "six hundred forty-one billion, four hundred forty-eight million, six hundred eighty-seven thousand, four hundred two".