72952780085 has 12 divisors (see below), whose sum is σ = 92995864068. Its totient is φ = 54929150976.

The previous prime is 72952780067. The next prime is 72952780123. The reversal of 72952780085 is 58008725927.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6028124881 + 66924655204 = 77641^2 + 258698^2 .

It is not a de Polignac number, because 72952780085 - 2¹⁸ = 72952517941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25241732 + ... + 25244621.

It is an arithmetic number, because the mean of its divisors is an integer number (7749655339).

Almost surely, 2^72952780085 is an apocalyptic number.

It is an amenable number.

72952780085 is a deficient number, since it is larger than the sum of its proper divisors (20043083983).

72952780085 is a wasteful number, since it uses less digits than its factorization.

72952780085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50486392 (or 50486375 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 53.

The spelling of 72952780085 in words is "seventy-two billion, nine hundred fifty-two million, seven hundred eighty thousand, eighty-five".