11387945583945 has 48 divisors (see below), whose sum is σ = 22581742390272. Its totient is φ = 5200664641920.

The previous prime is 11387945583929. The next prime is 11387945584061. The reversal of 11387945583945 is 54938554978311.

11387945583945 is a `hidden beast` number, since 1 + 1 + 3 + 8 + 7 + 9 + 455 + 83 + 94 + 5 = 666.

It is not a de Polignac number, because 11387945583945 - 2⁴ = 11387945583929 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 17928102 + ... + 18552431.

It is an arithmetic number, because the mean of its divisors is an integer number (470452966464).

Almost surely, 2^{11387945583945} is an apocalyptic number.

11387945583945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11387945583945 is a deficient number, since it is larger than the sum of its proper divisors (11193796806327).

11387945583945 is a wasteful number, since it uses less digits than its factorization.

11387945583945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481542 (or 36481539 counting only the distinct ones).

The product of its digits is 653184000, while the sum is 72.

The spelling of 11387945583945 in words is "eleven trillion, three hundred eighty-seven billion, nine hundred forty-five million, five hundred eighty-three thousand, nine hundred forty-five".