1156137978049 has 2 divisors, whose sum is σ = 1156137978050. Its totient is φ = 1156137978048.

The previous prime is 1156137978013. The next prime is 1156137978067. The reversal of 1156137978049 is 9408797316511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 963774158400 + 192363819649 = 981720^2 + 438593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156137978049 - 2³³ = 1147548043457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156137978349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578068989024 + 578068989025.

It is an arithmetic number, because the mean of its divisors is an integer number (578068989025).

Almost surely, 2^{1156137978049} is an apocalyptic number.

It is an amenable number.

1156137978049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156137978049 is an equidigital number, since it uses as much as digits as its factorization.

1156137978049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 1156137978049 in words is "one trillion, one hundred fifty-six billion, one hundred thirty-seven million, nine hundred seventy-eight thousand, forty-nine".