72750722212505 has 8 divisors (see below), whose sum is σ = 88948052818632. Its totient is φ = 57102453660928.

The previous prime is 72750722212499. The next prime is 72750722212517. The reversal of 72750722212505 is 50521222705727.

It can be written as a sum of positive squares in 4 ways, for example, as 11812886512144 + 60937835700361 = 3436988^2 + 7806269^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72750722212505 - 2⁴ = 72750722212489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72750722212505.

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, 137265513344 + ... + 137265513873.

It is an arithmetic number, because the mean of its divisors is an integer number (11118506602329).

Almost surely, 2^{72750722212505} is an apocalyptic number.

It is an amenable number.

72750722212505 is a deficient number, since it is larger than the sum of its proper divisors (16197330606127).

72750722212505 is a wasteful number, since it uses less digits than its factorization.

72750722212505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274531027275.

The product of its (nonzero) digits is 1372000, while the sum is 47.

The spelling of 72750722212505 in words is "seventy-two trillion, seven hundred fifty billion, seven hundred twenty-two million, two hundred twelve thousand, five hundred five".