72356661807 has 4 divisors (see below), whose sum is σ = 96475549080. Its totient is φ = 48237774536.

The previous prime is 72356661743. The next prime is 72356661847. The reversal of 72356661807 is 70816665327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72356661807 - 2⁶ = 72356661743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72356661807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72356661847) 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 3 ways as a sum of consecutive naturals, for example, 12059443632 + ... + 12059443637.

It is an arithmetic number, because the mean of its divisors is an integer number (24118887270).

Almost surely, 2^72356661807 is an apocalyptic number.

72356661807 is a deficient number, since it is larger than the sum of its proper divisors (24118887273).

72356661807 is a wasteful number, since it uses less digits than its factorization.

72356661807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24118887272.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 72356661807 in words is "seventy-two billion, three hundred fifty-six million, six hundred sixty-one thousand, eight hundred seven".