165145317792 has 288 divisors, whose sum is σ = 549633978432. Its totient is φ = 43028729856.

The previous prime is 165145317781. The next prime is 165145317809. The reversal of 165145317792 is 297713541561.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5059348 + ... + 5091884.

It is an arithmetic number, because the mean of its divisors is an integer number (1908451314).

Almost surely, 2^165145317792 is an apocalyptic number.

165145317792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165145317792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274816989216).

165145317792 is an abundant number, since it is smaller than the sum of its proper divisors (384488660640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165145317792 is a wasteful number, since it uses less digits than its factorization.

165145317792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32660 (or 32645 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 51.

The spelling of 165145317792 in words is "one hundred sixty-five billion, one hundred forty-five million, three hundred seventeen thousand, seven hundred ninety-two".