2155101134777 has 8 divisors (see below), whose sum is σ = 2162930377800. Its totient is φ = 2147272245504.

The previous prime is 2155101134773. The next prime is 2155101134827. The reversal of 2155101134777 is 7774311015512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 147598201 + 2154953536576 = 12149^2 + 1467976^2 .

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 2155101134777 - 2² = 2155101134773 is a prime.

It is a super-2 number, since 2×2155101134777² (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 (2155101134773) 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, 23285249 + ... + 23377617.

It is an arithmetic number, because the mean of its divisors is an integer number (270366297225).

Almost surely, 2^{2155101134777} is an apocalyptic number.

It is an amenable number.

2155101134777 is a deficient number, since it is larger than the sum of its proper divisors (7829243023).

2155101134777 is an equidigital number, since it uses as much as digits as its factorization.

2155101134777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176875.

The product of its (nonzero) digits is 205800, while the sum is 44.

The spelling of 2155101134777 in words is "two trillion, one hundred fifty-five billion, one hundred one million, one hundred thirty-four thousand, seven hundred seventy-seven".