2161235545154 has 32 divisors (see below), whose sum is σ = 3833167622400. Its totient is φ = 894202948800.

The previous prime is 2161235545151. The next prime is 2161235545163. The reversal of 2161235545154 is 4515455321612.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2161235545151) 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, 3336752 + ... + 3931460.

It is an arithmetic number, because the mean of its divisors is an integer number (119786488200).

Almost surely, 2^{2161235545154} is an apocalyptic number.

2161235545154 is a deficient number, since it is larger than the sum of its proper divisors (1671932077246).

2161235545154 is a wasteful number, since it uses less digits than its factorization.

2161235545154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603698.

The product of its digits is 720000, while the sum is 44.

The spelling of 2161235545154 in words is "two trillion, one hundred sixty-one billion, two hundred thirty-five million, five hundred forty-five thousand, one hundred fifty-four".