11887956838057 has 12 divisors (see below), whose sum is σ = 12452081158740. Its totient is φ = 11346878753280.

The previous prime is 11887956838033. The next prime is 11887956838061. The reversal of 11887956838057 is 75083865978811.

It can be written as a sum of positive squares in 2 ways, for example, as 4869542543616 + 7018414294441 = 2206704^2 + 2649229^2 .

It is not a de Polignac number, because 11887956838057 - 2¹¹ = 11887956836009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11887956838097) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84658632 + ... + 84798937.

It is an arithmetic number, because the mean of its divisors is an integer number (1037673429895).

Almost surely, 2^{11887956838057} is an apocalyptic number.

It is an amenable number.

11887956838057 is a deficient number, since it is larger than the sum of its proper divisors (564124320683).

11887956838057 is an equidigital number, since it uses as much as digits as its factorization.

11887956838057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169457704 (or 169457673 counting only the distinct ones).

The product of its (nonzero) digits is 812851200, while the sum is 76.

The spelling of 11887956838057 in words is "eleven trillion, eight hundred eighty-seven billion, nine hundred fifty-six million, eight hundred thirty-eight thousand, fifty-seven".