2154734154881 has 32 divisors (see below), whose sum is σ = 2699212861440. Its totient is φ = 1671027321600.

The previous prime is 2154734154851. The next prime is 2154734154899. The reversal of 2154734154881 is 1884514374512.

It is a happy number.

It is not a de Polignac number, because 2154734154881 - 2¹⁰ = 2154734153857 is a prime.

It is a super-2 number, since 2×2154734154881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154734154841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32853401 + ... + 32918921.

It is an arithmetic number, because the mean of its divisors is an integer number (84350401920).

Almost surely, 2^{2154734154881} is an apocalyptic number.

It is an amenable number.

2154734154881 is a deficient number, since it is larger than the sum of its proper divisors (544478706559).

2154734154881 is a wasteful number, since it uses less digits than its factorization.

2154734154881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67565.

The product of its digits is 4300800, while the sum is 53.

The spelling of 2154734154881 in words is "two trillion, one hundred fifty-four billion, seven hundred thirty-four million, one hundred fifty-four thousand, eight hundred eighty-one".