11881890478 has 16 divisors (see below), whose sum is σ = 18882475920. Its totient is φ = 5588148096.

The previous prime is 11881890473. The next prime is 11881890499. The reversal of 11881890478 is 87409818811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881890473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45648 + ... + 160771.

It is an arithmetic number, because the mean of its divisors is an integer number (1180154745).

Almost surely, 2^11881890478 is an apocalyptic number.

11881890478 is a deficient number, since it is larger than the sum of its proper divisors (7000585442).

11881890478 is a wasteful number, since it uses less digits than its factorization.

11881890478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208131.

The product of its (nonzero) digits is 1032192, while the sum is 55.

The spelling of 11881890478 in words is "eleven billion, eight hundred eighty-one million, eight hundred ninety thousand, four hundred seventy-eight".