11939625978 has 64 divisors (see below), whose sum is σ = 28503429120. Its totient is φ = 3262842432.

The previous prime is 11939625947. The next prime is 11939626043. The reversal of 11939625978 is 87952693911.

11939625978 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26575 + ... + 156797.

It is an arithmetic number, because the mean of its divisors is an integer number (445366080).

Almost surely, 2^11939625978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11939625978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14251714560).

11939625978 is an abundant number, since it is smaller than the sum of its proper divisors (16563803142).

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

11939625978 is a wasteful number, since it uses less digits than its factorization.

11939625978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130331.

The product of its digits is 7348320, while the sum is 60.

The spelling of 11939625978 in words is "eleven billion, nine hundred thirty-nine million, six hundred twenty-five thousand, nine hundred seventy-eight".