2155408145177 has 32 divisors (see below), whose sum is σ = 2543416972800. Its totient is φ = 1788604416000.

The previous prime is 2155408145173. The next prime is 2155408145207. The reversal of 2155408145177 is 7715418045512.

It is a cyclic number.

It is not a de Polignac number, because 2155408145177 - 2² = 2155408145173 is a prime.

It is a super-2 number, since 2×2155408145177² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155408145173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6874649 + ... + 7181337.

It is an arithmetic number, because the mean of its divisors is an integer number (79481780400).

Almost surely, 2^{2155408145177} is an apocalyptic number.

It is an amenable number.

2155408145177 is a deficient number, since it is larger than the sum of its proper divisors (388008827623).

2155408145177 is a wasteful number, since it uses less digits than its factorization.

2155408145177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307017.

The product of its (nonzero) digits is 1568000, while the sum is 50.

The spelling of 2155408145177 in words is "two trillion, one hundred fifty-five billion, four hundred eight million, one hundred forty-five thousand, one hundred seventy-seven".