1151638838461 has 2 divisors, whose sum is σ = 1151638838462. Its totient is φ = 1151638838460.

The previous prime is 1151638838353. The next prime is 1151638838509. The reversal of 1151638838461 is 1648388361511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927332406361 + 224306432100 = 962981^2 + 473610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151638838461 - 2⁹ = 1151638837949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151638838761) 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, 575819419230 + 575819419231.

It is an arithmetic number, because the mean of its divisors is an integer number (575819419231).

Almost surely, 2^{1151638838461} is an apocalyptic number.

It is an amenable number.

1151638838461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151638838461 is an equidigital number, since it uses as much as digits as its factorization.

1151638838461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 55.

The spelling of 1151638838461 in words is "one trillion, one hundred fifty-one billion, six hundred thirty-eight million, eight hundred thirty-eight thousand, four hundred sixty-one".