2156522061505 has 8 divisors (see below), whose sum is σ = 2957515970112. Its totient is φ = 1478757985008.

The previous prime is 2156522061437. The next prime is 2156522061523. The reversal of 2156522061505 is 5051602256512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156522061505 - 2⁷ = 2156522061377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30807457987 + ... + 30807458056.

It is an arithmetic number, because the mean of its divisors is an integer number (369689496264).

Almost surely, 2^{2156522061505} is an apocalyptic number.

It is an amenable number.

2156522061505 is a deficient number, since it is larger than the sum of its proper divisors (800993908607).

2156522061505 is an equidigital number, since it uses as much as digits as its factorization.

2156522061505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61614916055.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 2156522061505 in words is "two trillion, one hundred fifty-six billion, five hundred twenty-two million, sixty-one thousand, five hundred five".