2081616015415 has 4 divisors (see below), whose sum is σ = 2497939218504. Its totient is φ = 1665292812328.

The previous prime is 2081616015403. The next prime is 2081616015469. The reversal of 2081616015415 is 5145106161802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2081616015415 - 2⁵ = 2081616015383 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208161601537 + ... + 208161601546.

It is an arithmetic number, because the mean of its divisors is an integer number (624484804626).

Almost surely, 2^{2081616015415} is an apocalyptic number.

2081616015415 is a deficient number, since it is larger than the sum of its proper divisors (416323203089).

2081616015415 is an equidigital number, since it uses as much as digits as its factorization.

2081616015415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416323203088.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 2081616015415 in words is "two trillion, eighty-one billion, six hundred sixteen million, fifteen thousand, four hundred fifteen".