1155968501 has 4 divisors (see below), whose sum is σ = 1156089792. Its totient is φ = 1155847212.

The previous prime is 1155968479. The next prime is 1155968509. The reversal of 1155968501 is 1058695511.

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.

It is a cyclic number.

It is not a de Polignac number, because 1155968501 - 2²⁶ = 1088859637 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 (1155968509) 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, 45005 + ... + 65858.

It is an arithmetic number, because the mean of its divisors is an integer number (289022448).

Almost surely, 2^1155968501 is an apocalyptic number.

It is an amenable number.

1155968501 is a deficient number, since it is larger than the sum of its proper divisors (121291).

1155968501 is a wasteful number, since it uses less digits than its factorization.

1155968501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121290.

The product of its (nonzero) digits is 54000, while the sum is 41.

The square root of 1155968501 is about 33999.5367762562. The cubic root of 1155968501 is about 1049.4989297811.

The spelling of 1155968501 in words is "one billion, one hundred fifty-five million, nine hundred sixty-eight thousand, five hundred one".