641129502 has 48 divisors (see below), whose sum is σ = 1457462160. Its totient is φ = 186879744.

The previous prime is 641129501. The next prime is 641129537. The reversal of 641129502 is 205921146.

It is a super-2 number, since 2×641129502² = 822094076669536008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641129502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641129501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16774 + ... + 39542.

It is an arithmetic number, because the mean of its divisors is an integer number (30363795).

Almost surely, 2^641129502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641129502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728731080).

641129502 is an abundant number, since it is smaller than the sum of its proper divisors (816332658).

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

641129502 is a wasteful number, since it uses less digits than its factorization.

641129502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22825 (or 22806 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 641129502 is about 25320.5351839174. The cubic root of 641129502 is about 862.2805443762.

The spelling of 641129502 in words is "six hundred forty-one million, one hundred twenty-nine thousand, five hundred two".