641730769950 has 24 divisors (see below), whose sum is σ = 1591492309848. Its totient is φ = 171128205280.

The previous prime is 641730769913. The next prime is 641730769961. The reversal of 641730769950 is 59967037146.

It is a happy number.

It is a super-2 number, since 2×641730769950² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2139102417 + ... + 2139102716.

It is an arithmetic number, because the mean of its divisors is an integer number (66312179577).

Almost surely, 2^641730769950 is an apocalyptic number.

641730769950 is an abundant number, since it is smaller than the sum of its proper divisors (949761539898).

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

641730769950 is a wasteful number, since it uses less digits than its factorization.

641730769950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4278205148 (or 4278205143 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 641730769950 in words is "six hundred forty-one billion, seven hundred thirty million, seven hundred sixty-nine thousand, nine hundred fifty".