165930939540870 has 256 divisors, whose sum is σ = 485995624316928. Its totient is φ = 35431604651520.

The previous prime is 165930939540857. The next prime is 165930939540973. The reversal of 165930939540870 is 78045939039561.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a junction number, because it is equal to n+sod(n) for n = 165930939540795 and 165930939540804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3672559680 + ... + 3672604860.

It is an arithmetic number, because the mean of its divisors is an integer number (1898420407488).

Almost surely, 2^{165930939540870} is an apocalyptic number.

165930939540870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165930939540870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242997812158464).

165930939540870 is an abundant number, since it is smaller than the sum of its proper divisors (320064684776058).

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

165930939540870 is a wasteful number, since it uses less digits than its factorization.

165930939540870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62947.

The product of its (nonzero) digits is 220449600, while the sum is 69.

The spelling of 165930939540870 in words is "one hundred sixty-five trillion, nine hundred thirty billion, nine hundred thirty-nine million, five hundred forty thousand, eight hundred seventy".