1156715121055 has 32 divisors (see below), whose sum is σ = 1559962768896. Its totient is φ = 816978543744.

The previous prime is 1156715121017. The next prime is 1156715121059. The reversal of 1156715121055 is 5501215176511.

It is a cyclic number.

It is not a de Polignac number, because 1156715121055 - 2¹⁹ = 1156714596767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1156715120999 and 1156715121017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156715121059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21266124 + ... + 21320446.

It is an arithmetic number, because the mean of its divisors is an integer number (48748836528).

Almost surely, 2^{1156715121055} is an apocalyptic number.

1156715121055 is a deficient number, since it is larger than the sum of its proper divisors (403247647841).

1156715121055 is a wasteful number, since it uses less digits than its factorization.

1156715121055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68607.

The product of its (nonzero) digits is 52500, while the sum is 40.

The spelling of 1156715121055 in words is "one trillion, one hundred fifty-six billion, seven hundred fifteen million, one hundred twenty-one thousand, fifty-five".