165260501062640 has 160 divisors (see below), whose sum is σ = 415657459077120. Its totient is φ = 60892423805952.

The previous prime is 165260501062597. The next prime is 165260501062661. The reversal of 165260501062640 is 46260105062561.

It is a super-2 number, since 2×165260501062640² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165260501062591 and 165260501062600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84688817 + ... + 86618223.

It is an arithmetic number, because the mean of its divisors is an integer number (2597859119232).

Almost surely, 2^{165260501062640} is an apocalyptic number.

165260501062640 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 165260501062640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207828729538560).

165260501062640 is an abundant number, since it is smaller than the sum of its proper divisors (250396958014480).

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

165260501062640 is a wasteful number, since it uses less digits than its factorization.

165260501062640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930999 (or 1930993 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 165260501062640 in words is "one hundred sixty-five trillion, two hundred sixty billion, five hundred one million, sixty-two thousand, six hundred forty".