2161115215554 has 16 divisors (see below), whose sum is σ = 4322845604448. Its totient is φ = 720269209632.

The previous prime is 2161115215547. The next prime is 2161115215559. The reversal of 2161115215554 is 4555125111612.

It is not an unprimeable number, because it can be changed into a prime (2161115215559) 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, 25586547 + ... + 25670870.

It is an arithmetic number, because the mean of its divisors is an integer number (270177850278).

Almost surely, 2^{2161115215554} is an apocalyptic number.

2161115215554 is an abundant number, since it is smaller than the sum of its proper divisors (2161730388894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161115215554 is a wasteful number, since it uses less digits than its factorization.

2161115215554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51264449.

The product of its digits is 60000, while the sum is 39.

The spelling of 2161115215554 in words is "two trillion, one hundred sixty-one billion, one hundred fifteen million, two hundred fifteen thousand, five hundred fifty-four".