11506665051 has 36 divisors (see below), whose sum is σ = 19373445000. Its totient is φ = 6561934848.

The previous prime is 11506665043. The next prime is 11506665083. The reversal of 11506665051 is 15056660511.

It is not a de Polignac number, because 11506665051 - 2³ = 11506665043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11506664997 and 11506665015.

It is not an unprimeable number, because it can be changed into a prime (11506665091) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 193915 + ... + 246203.

It is an arithmetic number, because the mean of its divisors is an integer number (538151250).

Almost surely, 2^11506665051 is an apocalyptic number.

11506665051 is a deficient number, since it is larger than the sum of its proper divisors (7866779949).

11506665051 is a wasteful number, since it uses less digits than its factorization.

11506665051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52808 (or 52798 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 11506665051 in words is "eleven billion, five hundred six million, six hundred sixty-five thousand, fifty-one".