72106202051 has 8 divisors (see below), whose sum is σ = 77662581360. Its totient is φ = 66551215392.

The previous prime is 72106202041. The next prime is 72106202053. The reversal of 72106202051 is 15020260127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72106202051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72106202051.

It is not an unprimeable number, because it can be changed into a prime (72106202053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239360 + ... + 448893.

It is an arithmetic number, because the mean of its divisors is an integer number (9707822670).

Almost surely, 2^72106202051 is an apocalyptic number.

72106202051 is a deficient number, since it is larger than the sum of its proper divisors (5556379309).

72106202051 is a wasteful number, since it uses less digits than its factorization.

72106202051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696325.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 72106202051 its reverse (15020260127), we get a palindrome (87126462178).

The spelling of 72106202051 in words is "seventy-two billion, one hundred six million, two hundred two thousand, fifty-one".