2156303505405 has 16 divisors (see below), whose sum is σ = 3942954981504. Its totient is φ = 985738745280.

The previous prime is 2156303505371. The next prime is 2156303505409. The reversal of 2156303505405 is 5045053036512.

It is not a de Polignac number, because 2156303505405 - 2¹⁷ = 2156303374333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156303505409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10268111826 + ... + 10268112035.

It is an arithmetic number, because the mean of its divisors is an integer number (246434686344).

Almost surely, 2^{2156303505405} is an apocalyptic number.

It is an amenable number.

2156303505405 is a deficient number, since it is larger than the sum of its proper divisors (1786651476099).

2156303505405 is a wasteful number, since it uses less digits than its factorization.

2156303505405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20536223876.

The product of its (nonzero) digits is 270000, while the sum is 39.

The spelling of 2156303505405 in words is "two trillion, one hundred fifty-six billion, three hundred three million, five hundred five thousand, four hundred five".