165072451380 has 48 divisors (see below), whose sum is σ = 462764609664. Its totient is φ = 43965820800.

The previous prime is 165072451351. The next prime is 165072451393. The reversal of 165072451380 is 83154270561.

It is a happy number.

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, 1622071 + ... + 1720830.

It is an arithmetic number, because the mean of its divisors is an integer number (9640929368).

Almost surely, 2^165072451380 is an apocalyptic number.

165072451380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165072451380 is an abundant number, since it is smaller than the sum of its proper divisors (297692158284).

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

165072451380 is a wasteful number, since it uses less digits than its factorization.

165072451380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343736 (or 3343734 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 165072451380 in words is "one hundred sixty-five billion, seventy-two million, four hundred fifty-one thousand, three hundred eighty".