641423949075 has 432 divisors, whose sum is σ = 1482934252800. Its totient is φ = 262540776960.

The previous prime is 641423949031. The next prime is 641423949079. The reversal of 641423949075 is 570949324146.

641423949075 is a `hidden beast` number, since 6 + 4 + 142 + 3 + 9 + 490 + 7 + 5 = 666.

It is not a de Polignac number, because 641423949075 - 2¹⁰ = 641423948051 is a prime.

It is a super-2 number, since 2×641423949075² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641423949079) by changing a digit.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 1226431764 + ... + 1226432286.

Almost surely, 2^641423949075 is an apocalyptic number.

641423949075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

641423949075 is an abundant number, since it is smaller than the sum of its proper divisors (841510303725).

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

641423949075 is a wasteful number, since it uses less digits than its factorization.

641423949075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 641423949075 in words is "six hundred forty-one billion, four hundred twenty-three million, nine hundred forty-nine thousand, seventy-five".