165356240587 has 4 divisors (see below), whose sum is σ = 170690312896. Its totient is φ = 160022168280.

The previous prime is 165356240563. The next prime is 165356240603. The reversal of 165356240587 is 785042653561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165356240587 - 2²⁷ = 165222022859 is a prime.

It is a super-2 number, since 2×165356240587² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165356240507) 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, 2667036108 + ... + 2667036169.

It is an arithmetic number, because the mean of its divisors is an integer number (42672578224).

Almost surely, 2^165356240587 is an apocalyptic number.

165356240587 is a deficient number, since it is larger than the sum of its proper divisors (5334072309).

165356240587 is an equidigital number, since it uses as much as digits as its factorization.

165356240587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334072308.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 165356240587 in words is "one hundred sixty-five billion, three hundred fifty-six million, two hundred forty thousand, five hundred eighty-seven".