165655616001 has 8 divisors (see below), whose sum is σ = 230477378880. Its totient is φ = 105635465232.

The previous prime is 165655615973. The next prime is 165655616023. The reversal of 165655616001 is 100616556561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165655616001 - 2¹⁹ = 165655091713 is a prime.

It is a super-2 number, since 2×165655616001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165655616101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200402946 + ... + 1200403083.

It is an arithmetic number, because the mean of its divisors is an integer number (28809672360).

Almost surely, 2^165655616001 is an apocalyptic number.

It is an amenable number.

165655616001 is a deficient number, since it is larger than the sum of its proper divisors (64821762879).

165655616001 is a wasteful number, since it uses less digits than its factorization.

165655616001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400806055.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 165655616001 in words is "one hundred sixty-five billion, six hundred fifty-five million, six hundred sixteen thousand, one".