1651005116165 has 8 divisors (see below), whose sum is σ = 1981213418520. Its totient is φ = 1320799240192.

The previous prime is 1651005116149. The next prime is 1651005116183. The reversal of 1651005116165 is 5616115001561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 215223622084 + 1435781494081 = 463922^2 + 1198241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1651005116165 - 2⁴ = 1651005116149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660997 + ... + 2461893.

It is an arithmetic number, because the mean of its divisors is an integer number (247651677315).

Almost surely, 2^{1651005116165} is an apocalyptic number.

It is an amenable number.

1651005116165 is a deficient number, since it is larger than the sum of its proper divisors (330208302355).

1651005116165 is an equidigital number, since it uses as much as digits as its factorization.

1651005116165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213191.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1651005116165 in words is "one trillion, six hundred fifty-one billion, five million, one hundred sixteen thousand, one hundred sixty-five".