8121185537 has 16 divisors (see below), whose sum is σ = 8659709952. Its totient is φ = 7602413760.

The previous prime is 8121185521. The next prime is 8121185551. The reversal of 8121185537 is 7355811218.

It is a cyclic number.

It is not a de Polignac number, because 8121185537 - 2⁴ = 8121185521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8121185494 and 8121185503.

It is not an unprimeable number, because it can be changed into a prime (8121184537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177968 + ... + 218894.

It is an arithmetic number, because the mean of its divisors is an integer number (541231872).

Almost surely, 2^8121185537 is an apocalyptic number.

It is an amenable number.

8121185537 is a deficient number, since it is larger than the sum of its proper divisors (538524415).

8121185537 is a wasteful number, since it uses less digits than its factorization.

8121185537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41168.

The product of its digits is 67200, while the sum is 41.

The square root of 8121185537 is about 90117.6205688987. The cubic root of 8121185537 is about 2010.0482267745.

The spelling of 8121185537 in words is "eight billion, one hundred twenty-one million, one hundred eighty-five thousand, five hundred thirty-seven".