2115501620505 has 64 divisors (see below), whose sum is σ = 4166130544128. Its totient is φ = 892648120320.

The previous prime is 2115501620461. The next prime is 2115501620537. The reversal of 2115501620505 is 5050261055112.

It is not a de Polignac number, because 2115501620505 - 2¹¹ = 2115501618457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40816267 + ... + 40868063.

It is an arithmetic number, because the mean of its divisors is an integer number (65095789752).

Almost surely, 2^{2115501620505} is an apocalyptic number.

It is an amenable number.

2115501620505 is a deficient number, since it is larger than the sum of its proper divisors (2050628923623).

2115501620505 is a wasteful number, since it uses less digits than its factorization.

2115501620505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81746.

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 2115501620505 its reverse (5050261055112), we get a palindrome (7165762675617).

The spelling of 2115501620505 in words is "two trillion, one hundred fifteen billion, five hundred one million, six hundred twenty thousand, five hundred five".