11587749957978 has 16 divisors (see below), whose sum is σ = 23388119182560. Its totient is φ = 3827146774896.

The previous prime is 11587749957941. The next prime is 11587749958021. The reversal of 11587749957978 is 87975994778511.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11587749957894 and 11587749957903.

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 7 ways as a sum of consecutive naturals, for example, 8859135400 + ... + 8859136707.

It is an arithmetic number, because the mean of its divisors is an integer number (1461757448910).

Almost surely, 2^{11587749957978} is an apocalyptic number.

11587749957978 is an abundant number, since it is smaller than the sum of its proper divisors (11800369224582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11587749957978 is a wasteful number, since it uses less digits than its factorization.

11587749957978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17718272221.

The product of its digits is 11202105600, while the sum is 87.

The spelling of 11587749957978 in words is "eleven trillion, five hundred eighty-seven billion, seven hundred forty-nine million, nine hundred fifty-seven thousand, nine hundred seventy-eight".