2156454777794 has 16 divisors (see below), whose sum is σ = 3325231347648. Its totient is φ = 1048099159152.

The previous prime is 2156454777779. The next prime is 2156454777797. The reversal of 2156454777794 is 4977774546512.

It is not an unprimeable number, because it can be changed into a prime (2156454777797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13628432 + ... + 13785755.

It is an arithmetic number, because the mean of its divisors is an integer number (207826959228).

Almost surely, 2^{2156454777794} is an apocalyptic number.

2156454777794 is a deficient number, since it is larger than the sum of its proper divisors (1168776569854).

2156454777794 is a wasteful number, since it uses less digits than its factorization.

2156454777794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27415289.

The product of its digits is 414892800, while the sum is 68.

The spelling of 2156454777794 in words is "two trillion, one hundred fifty-six billion, four hundred fifty-four million, seven hundred seventy-seven thousand, seven hundred ninety-four".