117756529821 has 12 divisors (see below), whose sum is σ = 194391731872. Its totient is φ = 67289445576.

The previous prime is 117756529817. The next prime is 117756529837. The reversal of 117756529821 is 128925657711.

117756529821 is a `hidden beast` number, since 1 + 1 + 77 + 565 + 2 + 9 + 8 + 2 + 1 = 666.

It is not a de Polignac number, because 117756529821 - 2² = 117756529817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117756529841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934575571 + ... + 934575696.

Almost surely, 2^117756529821 is an apocalyptic number.

It is an amenable number.

117756529821 is a deficient number, since it is larger than the sum of its proper divisors (76635202051).

117756529821 is a wasteful number, since it uses less digits than its factorization.

117756529821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869151280 (or 1869151277 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 54.

The spelling of 117756529821 in words is "one hundred seventeen billion, seven hundred fifty-six million, five hundred twenty-nine thousand, eight hundred twenty-one".