72293245686 has 20 divisors (see below), whose sum is σ = 161990421252. Its totient is φ = 24097748508.

The previous prime is 72293245679. The next prime is 72293245741. The reversal of 72293245686 is 68654239227.

72293245686 is a `hidden beast` number, since 7 + 22 + 93 + 2 + 456 + 86 = 666.

It is a super-2 number, since 2×72293245686² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 223127140 + ... + 223127463.

Almost surely, 2^72293245686 is an apocalyptic number.

72293245686 is an abundant number, since it is smaller than the sum of its proper divisors (89697175566).

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

72293245686 is a wasteful number, since it uses less digits than its factorization.

72293245686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446254617 (or 446254608 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 72293245686 in words is "seventy-two billion, two hundred ninety-three million, two hundred forty-five thousand, six hundred eighty-six".