11723350640 has 20 divisors (see below), whose sum is σ = 27256790424. Its totient is φ = 4689340224.

The previous prime is 11723350627. The next prime is 11723350643. The reversal of 11723350640 is 4605332711.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 11723350597 and 11723350606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11723350643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73270862 + ... + 73271021.

Almost surely, 2^11723350640 is an apocalyptic number.

11723350640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11723350640 is an abundant number, since it is smaller than the sum of its proper divisors (15533439784).

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

11723350640 is a wasteful number, since it uses less digits than its factorization.

11723350640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146541896 (or 146541890 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 11723350640 in words is "eleven billion, seven hundred twenty-three million, three hundred fifty thousand, six hundred forty".