72550550055505 has 8 divisors (see below), whose sum is σ = 87060706467624. Its totient is φ = 58040409110400.

The previous prime is 72550550055491. The next prime is 72550550055517. The reversal of 72550550055505 is 50555005505527.

It can be written as a sum of positive squares in 4 ways, for example, as 605259104256 + 71945290951249 = 777984^2 + 8482057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72550550055505 - 2³¹ = 72548402571857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13745245 + ... + 18276565.

It is an arithmetic number, because the mean of its divisors is an integer number (10882588308453).

Almost surely, 2^{72550550055505} is an apocalyptic number.

It is an amenable number.

72550550055505 is a deficient number, since it is larger than the sum of its proper divisors (14510156412119).

72550550055505 is a wasteful number, since it uses less digits than its factorization.

72550550055505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733507.

The product of its (nonzero) digits is 5468750, while the sum is 49.

The spelling of 72550550055505 in words is "seventy-two trillion, five hundred fifty billion, five hundred fifty million, fifty-five thousand, five hundred five".