11908378878 has 16 divisors (see below), whose sum is σ = 25981917696. Its totient is φ = 3608599640.

The previous prime is 11908378871. The next prime is 11908378891. The reversal of 11908378878 is 87887380911.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11908378871) 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, 90214926 + ... + 90215057.

It is an arithmetic number, because the mean of its divisors is an integer number (1623869856).

Almost surely, 2^11908378878 is an apocalyptic number.

11908378878 is an abundant number, since it is smaller than the sum of its proper divisors (14073538818).

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

11908378878 is a wasteful number, since it uses less digits than its factorization.

11908378878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180429999.

The product of its (nonzero) digits is 5419008, while the sum is 60.

The spelling of 11908378878 in words is "eleven billion, nine hundred eight million, three hundred seventy-eight thousand, eight hundred seventy-eight".