2156340242015 has 16 divisors (see below), whose sum is σ = 2727740104320. Its totient is φ = 1631913778080.

The previous prime is 2156340242009. The next prime is 2156340242107. The reversal of 2156340242015 is 5102420436512.

It is not a de Polignac number, because 2156340242015 - 2²⁶ = 2156273133151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16358609 + ... + 16489898.

It is an arithmetic number, because the mean of its divisors is an integer number (170483756520).

Almost surely, 2^{2156340242015} is an apocalyptic number.

2156340242015 is a deficient number, since it is larger than the sum of its proper divisors (571399862305).

2156340242015 is a wasteful number, since it uses less digits than its factorization.

2156340242015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32849222.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 2156340242015 its reverse (5102420436512), we get a palindrome (7258760678527).

The spelling of 2156340242015 in words is "two trillion, one hundred fifty-six billion, three hundred forty million, two hundred forty-two thousand, fifteen".