2157647011 has 8 divisors (see below), whose sum is σ = 2445915920. Its totient is φ = 1886848992.

The previous prime is 2157646999. The next prime is 2157647047. The reversal of 2157647011 is 1107467512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157647011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157647911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4367460 + ... + 4367953.

It is an arithmetic number, because the mean of its divisors is an integer number (305739490).

Almost surely, 2^2157647011 is an apocalyptic number.

2157647011 is a deficient number, since it is larger than the sum of its proper divisors (288268909).

2157647011 is a wasteful number, since it uses less digits than its factorization.

2157647011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735445.

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

The square root of 2157647011 is about 46450.4791256237. The cubic root of 2157647011 is about 1292.1912581853.

The spelling of 2157647011 in words is "two billion, one hundred fifty-seven million, six hundred forty-seven thousand, eleven".