2151605888138 has 8 divisors (see below), whose sum is σ = 3688467236832. Its totient is φ = 922116809196.

The previous prime is 2151605888137. The next prime is 2151605888161. The reversal of 2151605888138 is 8318885061512.

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

It is a super-2 number, since 2×2151605888138² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151605888137) 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, 76843067420 + ... + 76843067447.

It is an arithmetic number, because the mean of its divisors is an integer number (461058404604).

Almost surely, 2^{2151605888138} is an apocalyptic number.

2151605888138 is a deficient number, since it is larger than the sum of its proper divisors (1536861348694).

2151605888138 is a wasteful number, since it uses less digits than its factorization.

2151605888138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153686134876.

The product of its (nonzero) digits is 3686400, while the sum is 56.

The spelling of 2151605888138 in words is "two trillion, one hundred fifty-one billion, six hundred five million, eight hundred eighty-eight thousand, one hundred thirty-eight".