641340586747 has 20 divisors (see below), whose sum is σ = 749255444496. Its totient is φ = 548934867600.

The previous prime is 641340586597. The next prime is 641340586829. The reversal of 641340586747 is 747685043146.

It is a de Polignac number, because none of the positive numbers 2^k-641340586747 is a prime.

It is a super-2 number, since 2×641340586747² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641340586147) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1492578 + ... + 1873624.

Almost surely, 2^641340586747 is an apocalyptic number.

641340586747 is a deficient number, since it is larger than the sum of its proper divisors (107914857749).

641340586747 is an frugal number, since it uses more digits than its factorization.

641340586747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381776 (or 381755 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 55.

The spelling of 641340586747 in words is "six hundred forty-one billion, three hundred forty million, five hundred eighty-six thousand, seven hundred forty-seven".