641231429586 has 96 divisors (see below), whose sum is σ = 1526357414592. Its totient is φ = 177939440640.

The previous prime is 641231429539. The next prime is 641231429599. The reversal of 641231429586 is 685924132146.

It is a happy number.

It is a super-2 number, since 2×641231429586² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251440 + ... + 1160036.

It is an arithmetic number, because the mean of its divisors is an integer number (15899556402).

Almost surely, 2^641231429586 is an apocalyptic number.

641231429586 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 641231429586, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763178707296).

641231429586 is an abundant number, since it is smaller than the sum of its proper divisors (885125985006).

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

641231429586 is a wasteful number, since it uses less digits than its factorization.

641231429586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908684 (or 908667 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The spelling of 641231429586 in words is "six hundred forty-one billion, two hundred thirty-one million, four hundred twenty-nine thousand, five hundred eighty-six".