2154405551206 has 8 divisors (see below), whose sum is σ = 3233051660160. Its totient is φ = 1076721664488.

The previous prime is 2154405551173. The next prime is 2154405551209. The reversal of 2154405551206 is 6021555044512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154405551209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240549961 + ... + 240558916.

It is an arithmetic number, because the mean of its divisors is an integer number (404131457520).

Almost surely, 2^{2154405551206} is an apocalyptic number.

2154405551206 is a deficient number, since it is larger than the sum of its proper divisors (1078646108954).

2154405551206 is a wasteful number, since it uses less digits than its factorization.

2154405551206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481111118.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 2154405551206 in words is "two trillion, one hundred fifty-four billion, four hundred five million, five hundred fifty-one thousand, two hundred six".