3123206556155 has 16 divisors (see below), whose sum is σ = 4535210865600. Its totient is φ = 2015649272832.

The previous prime is 3123206556103. The next prime is 3123206556157. The reversal of 3123206556155 is 5516556023213.

It is a cyclic number.

It is not a de Polignac number, because 3123206556155 - 2²⁴ = 3123189778939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3123206556157) 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, 2624542730 + ... + 2624543919.

It is an arithmetic number, because the mean of its divisors is an integer number (283450679100).

Almost surely, 2^{3123206556155} is an apocalyptic number.

3123206556155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3123206556155 is a deficient number, since it is larger than the sum of its proper divisors (1412004309445).

3123206556155 is a wasteful number, since it uses less digits than its factorization.

3123206556155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249086678.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 3123206556155 in words is "three trillion, one hundred twenty-three billion, two hundred six million, five hundred fifty-six thousand, one hundred fifty-five".