11935487890 has 16 divisors (see below), whose sum is σ = 21492326232. Its totient is φ = 4772317824.

The previous prime is 11935487881. The next prime is 11935487923. The reversal of 11935487890 is 9878453911.

It is a happy number.

11935487890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11193851601 + 741636289 = 105801^2 + 27233^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 207819 + ... + 258958.

Almost surely, 2^11935487890 is an apocalyptic number.

11935487890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11935487890 is a deficient number, since it is larger than the sum of its proper divisors (9556838342).

11935487890 is a wasteful number, since it uses less digits than its factorization.

11935487890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469341.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 11935487890 in words is "eleven billion, nine hundred thirty-five million, four hundred eighty-seven thousand, eight hundred ninety".