6641620502515 has 12 divisors (see below), whose sum is σ = 8316498539664. Its totient is φ = 5082262366896.

The previous prime is 6641620502509. The next prime is 6641620502633. The reversal of 6641620502515 is 5152050261466.

It is not a de Polignac number, because 6641620502515 - 2¹⁷ = 6641620371443 is a prime.

It is a super-2 number, since 2×6641620502515² (a number of 26 digits) contains 22 as substring.

It is a Duffinian 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, 27516526 + ... + 27756844.

It is an arithmetic number, because the mean of its divisors is an integer number (693041544972).

Almost surely, 2^{6641620502515} is an apocalyptic number.

6641620502515 is a deficient number, since it is larger than the sum of its proper divisors (1674878037149).

6641620502515 is an frugal number, since it uses more digits than its factorization.

6641620502515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480666 (or 240347 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 6641620502515 in words is "six trillion, six hundred forty-one billion, six hundred twenty million, five hundred two thousand, five hundred fifteen".