165942344980 has 48 divisors (see below), whose sum is σ = 351662713920. Its totient is φ = 65772345600.

The previous prime is 165942344957. The next prime is 165942345011. The reversal of 165942344980 is 89443249561.

It is a super-2 number, since 2×165942344980² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391095 + ... + 1505665.

It is an arithmetic number, because the mean of its divisors is an integer number (7326306540).

Almost surely, 2^165942344980 is an apocalyptic number.

165942344980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165942344980 is an abundant number, since it is smaller than the sum of its proper divisors (185720368940).

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

165942344980 is a wasteful number, since it uses less digits than its factorization.

165942344980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115240 (or 115238 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 165942344980 in words is "one hundred sixty-five billion, nine hundred forty-two million, three hundred forty-four thousand, nine hundred eighty".