72421653370767 has 4 divisors (see below), whose sum is σ = 96562204494360. Its totient is φ = 48281102247176.

The previous prime is 72421653370763. The next prime is 72421653370817. The reversal of 72421653370767 is 76707335612427.

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 72421653370767 - 2² = 72421653370763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72421653370767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72421653370763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12070275561792 + ... + 12070275561797.

It is an arithmetic number, because the mean of its divisors is an integer number (24140551123590).

Almost surely, 2^{72421653370767} is an apocalyptic number.

72421653370767 is a deficient number, since it is larger than the sum of its proper divisors (24140551123593).

72421653370767 is a wasteful number, since it uses less digits than its factorization.

72421653370767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24140551123592.

The product of its (nonzero) digits is 62233920, while the sum is 60.

The spelling of 72421653370767 in words is "seventy-two trillion, four hundred twenty-one billion, six hundred fifty-three million, three hundred seventy thousand, seven hundred sixty-seven".