11721751432 has 8 divisors (see below), whose sum is σ = 21978283950. Its totient is φ = 5860875712.

The previous prime is 11721751429. The next prime is 11721751463. The reversal of 11721751432 is 23415712711.

It can be written as a sum of positive squares in only one way, i.e., 11721526756 + 224676 = 108266^2 + 474^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 732609457 + ... + 732609472.

Almost surely, 2^11721751432 is an apocalyptic number.

It is an amenable number.

11721751432 is a deficient number, since it is larger than the sum of its proper divisors (10256532518).

11721751432 is a wasteful number, since it uses less digits than its factorization.

11721751432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465218935 (or 1465218931 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The spelling of 11721751432 in words is "eleven billion, seven hundred twenty-one million, seven hundred fifty-one thousand, four hundred thirty-two".