11453630635521 has 6 divisors (see below), whose sum is σ = 16544133140210. Its totient is φ = 7635753757008.

The previous prime is 11453630635507. The next prime is 11453630635583. The reversal of 11453630635521 is 12553603635411.

11453630635521 is a `hidden beast` number, since 1 + 1 + 4 + 5 + 3 + 6 + 3 + 0 + 635 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11301437021121 + 152193614400 = 3361761^2 + 390120^2 .

It is not a de Polignac number, because 11453630635521 - 2¹⁵ = 11453630602753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11453630636521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 636312813076 + ... + 636312813093.

Almost surely, 2^{11453630635521} is an apocalyptic number.

It is an amenable number.

11453630635521 is a deficient number, since it is larger than the sum of its proper divisors (5090502504689).

11453630635521 is a wasteful number, since it uses less digits than its factorization.

11453630635521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272625626175 (or 1272625626172 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 11453630635521 in words is "eleven trillion, four hundred fifty-three billion, six hundred thirty million, six hundred thirty-five thousand, five hundred twenty-one".