1156507061971 has 2 divisors, whose sum is σ = 1156507061972. Its totient is φ = 1156507061970.

The previous prime is 1156507061959. The next prime is 1156507061981. The reversal of 1156507061971 is 1791607056511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1156507061971 - 2²⁷ = 1156372844243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156507061921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578253530985 + 578253530986.

It is an arithmetic number, because the mean of its divisors is an integer number (578253530986).

Almost surely, 2^{1156507061971} is an apocalyptic number.

1156507061971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156507061971 is an equidigital number, since it uses as much as digits as its factorization.

1156507061971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 396900, while the sum is 49.

The spelling of 1156507061971 in words is "one trillion, one hundred fifty-six billion, five hundred seven million, sixty-one thousand, nine hundred seventy-one".