2155346123655 has 8 divisors (see below), whose sum is σ = 3448553797872. Its totient is φ = 1149517932608.

The previous prime is 2155346123653. The next prime is 2155346123659. The reversal of 2155346123655 is 5563216435512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155346123655 - 2¹ = 2155346123653 is a prime.

It is a super-3 number, since 3×2155346123655³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155346123653) 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, 71844870774 + ... + 71844870803.

It is an arithmetic number, because the mean of its divisors is an integer number (431069224734).

Almost surely, 2^{2155346123655} is an apocalyptic number.

2155346123655 is a deficient number, since it is larger than the sum of its proper divisors (1293207674217).

2155346123655 is a wasteful number, since it uses less digits than its factorization.

2155346123655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143689741585.

The product of its digits is 3240000, while the sum is 48.

The spelling of 2155346123655 in words is "two trillion, one hundred fifty-five billion, three hundred forty-six million, one hundred twenty-three thousand, six hundred fifty-five".