72645621402147 has 8 divisors (see below), whose sum is σ = 99478688767056. Its totient is φ = 47121484152672.

The previous prime is 72645621402121. The next prime is 72645621402181. The reversal of 72645621402147 is 74120412654627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72645621402147 - 2⁸ = 72645621401891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72645621402147.

It is not an unprimeable number, because it can be changed into a prime (72645621402187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327232528728 + ... + 327232528949.

It is an arithmetic number, because the mean of its divisors is an integer number (12434836095882).

Almost surely, 2^{72645621402147} is an apocalyptic number.

72645621402147 is a deficient number, since it is larger than the sum of its proper divisors (26833067364909).

72645621402147 is a wasteful number, since it uses less digits than its factorization.

72645621402147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654465057717.

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 72645621402147 in words is "seventy-two trillion, six hundred forty-five billion, six hundred twenty-one million, four hundred two thousand, one hundred forty-seven".