2101854523678 has 64 divisors (see below), whose sum is σ = 3891845744640. Its totient is φ = 829040832000.

The previous prime is 2101854523673. The next prime is 2101854523709. The reversal of 2101854523678 is 8763254581012.

It is a super-3 number, since 3×2101854523678³ (a number of 38 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101854523673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194053723 + ... + 194064553.

It is an arithmetic number, because the mean of its divisors is an integer number (60810089760).

Almost surely, 2^{2101854523678} is an apocalyptic number.

2101854523678 is a deficient number, since it is larger than the sum of its proper divisors (1789991220962).

2101854523678 is a wasteful number, since it uses less digits than its factorization.

2101854523678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 2101854523678 in words is "two trillion, one hundred one billion, eight hundred fifty-four million, five hundred twenty-three thousand, six hundred seventy-eight".