641308616465 has 16 divisors (see below), whose sum is σ = 852061602240. Its totient is φ = 459444976320.

The previous prime is 641308616461. The next prime is 641308616489. The reversal of 641308616465 is 564616803146.

It is not a de Polignac number, because 641308616465 - 2² = 641308616461 is a prime.

It is a super-2 number, since 2×641308616465² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641308616461) 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, 87012410 + ... + 87019779.

It is an arithmetic number, because the mean of its divisors is an integer number (53253850140).

Almost surely, 2^641308616465 is an apocalyptic number.

It is an amenable number.

641308616465 is a deficient number, since it is larger than the sum of its proper divisors (210752985775).

641308616465 is a wasteful number, since it uses less digits than its factorization.

641308616465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174032272.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 641308616465 in words is "six hundred forty-one billion, three hundred eight million, six hundred sixteen thousand, four hundred sixty-five".