1148611681438 has 32 divisors (see below), whose sum is σ = 1864649324160. Its totient is φ = 527501086560.

The previous prime is 1148611681433. The next prime is 1148611681453. The reversal of 1148611681438 is 8341861168411.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1148611681433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28391781 + ... + 28432207.

It is an arithmetic number, because the mean of its divisors is an integer number (58270291380).

Almost surely, 2^{1148611681438} is an apocalyptic number.

1148611681438 is a deficient number, since it is larger than the sum of its proper divisors (716037642722).

1148611681438 is a wasteful number, since it uses less digits than its factorization.

1148611681438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45832.

The product of its digits is 884736, while the sum is 52.

The spelling of 1148611681438 in words is "one trillion, one hundred forty-eight billion, six hundred eleven million, six hundred eighty-one thousand, four hundred thirty-eight".