11891633950 has 48 divisors (see below), whose sum is σ = 25528571424. Its totient is φ = 4036752000.

The previous prime is 11891633933. The next prime is 11891633953. The reversal of 11891633950 is 5933619811.

It is a self number, because there is not a number n which added to its sum of digits gives 11891633950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11891633953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132849 + ... + 203548.

It is an arithmetic number, because the mean of its divisors is an integer number (531845238).

Almost surely, 2^11891633950 is an apocalyptic number.

11891633950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11891633950 is an abundant number, since it is smaller than the sum of its proper divisors (13636937474).

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

11891633950 is a wasteful number, since it uses less digits than its factorization.

11891633950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336517 (or 336512 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 11891633950 in words is "eleven billion, eight hundred ninety-one million, six hundred thirty-three thousand, nine hundred fifty".