165706489455 has 16 divisors (see below), whose sum is σ = 285525028320. Its totient is φ = 81578579328.

The previous prime is 165706489409. The next prime is 165706489457. The reversal of 165706489455 is 554984607561.

It is not a de Polignac number, because 165706489455 - 2¹³ = 165706481263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165706489457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424888240 + ... + 424888629.

It is an arithmetic number, because the mean of its divisors is an integer number (17845314270).

Almost surely, 2^165706489455 is an apocalyptic number.

165706489455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165706489455 is a deficient number, since it is larger than the sum of its proper divisors (119818538865).

165706489455 is a wasteful number, since it uses less digits than its factorization.

165706489455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849776890.

The product of its (nonzero) digits is 36288000, while the sum is 60.

The spelling of 165706489455 in words is "one hundred sixty-five billion, seven hundred six million, four hundred eighty-nine thousand, four hundred fifty-five".