641620442116 has 48 divisors (see below), whose sum is σ = 1218281141952. Its totient is φ = 294478156800.

The previous prime is 641620442077. The next prime is 641620442117. The reversal of 641620442116 is 611244026146.

It is a happy number.

It is a super-2 number, since 2×641620442116² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641620442117) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8849251 + ... + 8921461.

It is an arithmetic number, because the mean of its divisors is an integer number (25380857124).

Almost surely, 2^641620442116 is an apocalyptic number.

It is an amenable number.

641620442116 is a deficient number, since it is larger than the sum of its proper divisors (576660699836).

641620442116 is a wasteful number, since it uses less digits than its factorization.

641620442116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75460 (or 75458 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 641620442116 in words is "six hundred forty-one billion, six hundred twenty million, four hundred forty-two thousand, one hundred sixteen".