72398951766 has 32 divisors (see below), whose sum is σ = 163152576000. Its totient is φ = 23793081480.

The previous prime is 72398951761. The next prime is 72398951777. The reversal of 72398951766 is 66715989327.

72398951766 is a `hidden beast` number, since 7 + 2 + 39 + 89 + 517 + 6 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72398951761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9437866 + ... + 9445533.

It is an arithmetic number, because the mean of its divisors is an integer number (5098518000).

Almost surely, 2^72398951766 is an apocalyptic number.

72398951766 is an abundant number, since it is smaller than the sum of its proper divisors (90753624234).

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

72398951766 is a wasteful number, since it uses less digits than its factorization.

72398951766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18883481 (or 18883475 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 72398951766 in words is "seventy-two billion, three hundred ninety-eight million, nine hundred fifty-one thousand, seven hundred sixty-six".