641420862120 has 96 divisors (see below), whose sum is σ = 2092036700520. Its totient is φ = 170436833280.

The previous prime is 641420862097. The next prime is 641420862151. The reversal of 641420862120 is 21268024146.

641420862120 is a `hidden beast` number, since 6 + 4 + 1 + 4 + 2 + 0 + 8 + 621 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 618843395556 + 22577466564 = 786666^2 + 150258^2 .

It is a super-2 number, since 2×641420862120² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3069169 + ... + 3271488.

Almost surely, 2^641420862120 is an apocalyptic number.

641420862120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641420862120 is an abundant number, since it is smaller than the sum of its proper divisors (1450615838400).

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

641420862120 is a wasteful number, since it uses less digits than its factorization.

641420862120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340955 (or 6340948 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

Adding to 641420862120 its reverse (21268024146), we get a palindrome (662688886266).

The spelling of 641420862120 in words is "six hundred forty-one billion, four hundred twenty million, eight hundred sixty-two thousand, one hundred twenty".