16620987352615 has 32 divisors (see below), whose sum is σ = 21156640485696. Its totient is φ = 12519433405440.

The previous prime is 16620987352597. The next prime is 16620987352649. The reversal of 16620987352615 is 51625378902661.

It is not a de Polignac number, because 16620987352615 - 2¹¹ = 16620987350567 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10894881 + ... + 12326410.

It is an arithmetic number, because the mean of its divisors is an integer number (661145015178).

Almost surely, 2^{16620987352615} is an apocalyptic number.

16620987352615 is a deficient number, since it is larger than the sum of its proper divisors (4535653133081).

16620987352615 is a wasteful number, since it uses less digits than its factorization.

16620987352615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23221459.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 16620987352615 in words is "sixteen trillion, six hundred twenty billion, nine hundred eighty-seven million, three hundred fifty-two thousand, six hundred fifteen".