165439397760 has 1536 divisors, whose sum is σ = 715568515200. Its totient is φ = 32105299968.

The previous prime is 165439397731. The next prime is 165439397779. The reversal of 165439397760 is 67793934561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 165439397694 and 165439397703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1517792586 + ... + 1517792694.

Almost surely, 2^165439397760 is an apocalyptic number.

165439397760 is a gapful number since it is divisible by the number (10) 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 165439397760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357784257600).

165439397760 is an abundant number, since it is smaller than the sum of its proper divisors (550129117440).

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

165439397760 is a wasteful number, since it uses less digits than its factorization.

165439397760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 60.

The spelling of 165439397760 in words is "one hundred sixty-five billion, four hundred thirty-nine million, three hundred ninety-seven thousand, seven hundred sixty".