11581450772 has 6 divisors (see below), whose sum is σ = 20267538858. Its totient is φ = 5790725384.

The previous prime is 11581450739. The next prime is 11581450799. The reversal of 11581450772 is 27705418511.

It can be written as a sum of positive squares in only one way, i.e., 11260180996 + 321269776 = 106114^2 + 17924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1447681343 + ... + 1447681350.

It is an arithmetic number, because the mean of its divisors is an integer number (3377923143).

Almost surely, 2^11581450772 is an apocalyptic number.

It is an amenable number.

11581450772 is a deficient number, since it is larger than the sum of its proper divisors (8686088086).

11581450772 is a wasteful number, since it uses less digits than its factorization.

11581450772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895362697 (or 2895362695 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 41.

The spelling of 11581450772 in words is "eleven billion, five hundred eighty-one million, four hundred fifty thousand, seven hundred seventy-two".