11941322640 has 80 divisors (see below), whose sum is σ = 39865656768. Its totient is φ = 2939401728.

The previous prime is 11941322639. The next prime is 11941322651. The reversal of 11941322640 is 4622314911.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910554 + ... + 1916793.

Almost surely, 2^11941322640 is an apocalyptic number.

11941322640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11941322640 is an abundant number, since it is smaller than the sum of its proper divisors (27924334128).

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

11941322640 is a wasteful number, since it uses less digits than its factorization.

11941322640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827376 (or 3827370 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 11941322640 in words is "eleven billion, nine hundred forty-one million, three hundred twenty-two thousand, six hundred forty".