115510565501 has 4 divisors (see below), whose sum is σ = 115520650272. Its totient is φ = 115500480732.

The previous prime is 115510565459. The next prime is 115510565507. The reversal of 115510565501 is 105565015511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105565015511 = 31 ⋅3405323081.

It is a cyclic number.

It is not a de Polignac number, because 115510565501 - 2⁶ = 115510565437 is a prime.

It is a super-2 number, since 2×115510565501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115510565507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025185 + ... + 5048118.

It is an arithmetic number, because the mean of its divisors is an integer number (28880162568).

Almost surely, 2^115510565501 is an apocalyptic number.

It is an amenable number.

115510565501 is a deficient number, since it is larger than the sum of its proper divisors (10084771).

115510565501 is a wasteful number, since it uses less digits than its factorization.

115510565501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084770.

The product of its (nonzero) digits is 18750, while the sum is 35.

The spelling of 115510565501 in words is "one hundred fifteen billion, five hundred ten million, five hundred sixty-five thousand, five hundred one".