72165214450 has 48 divisors (see below), whose sum is σ = 154892050560. Its totient is φ = 24502129920.

The previous prime is 72165214427. The next prime is 72165214481. The reversal of 72165214450 is 5441256127.

It is a super-2 number, since 2×72165214450² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964855 + ... + 1036954.

It is an arithmetic number, because the mean of its divisors is an integer number (3226917720).

Almost surely, 2^72165214450 is an apocalyptic number.

72165214450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72165214450 is an abundant number, since it is smaller than the sum of its proper divisors (82726836110).

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

72165214450 is a wasteful number, since it uses less digits than its factorization.

72165214450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001931 (or 2001926 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 72165214450 in words is "seventy-two billion, one hundred sixty-five million, two hundred fourteen thousand, four hundred fifty".