72356661806 has 16 divisors (see below), whose sum is σ = 127509642288. Its totient is φ = 30359438400.

The previous prime is 72356661743. The next prime is 72356661847. The reversal of 72356661806 is 60816665327.

It is a super-3 number, since 3×72356661806³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

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, 126497375 + ... + 126497946.

It is an arithmetic number, because the mean of its divisors is an integer number (7969352643).

Almost surely, 2^72356661806 is an apocalyptic number.

72356661806 is a deficient number, since it is larger than the sum of its proper divisors (55152980482).

72356661806 is a wasteful number, since it uses less digits than its factorization.

72356661806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252995347.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 72356661806 in words is "seventy-two billion, three hundred fifty-six million, six hundred sixty-one thousand, eight hundred six".