72645621402145 has 32 divisors (see below), whose sum is σ = 100695296759040. Its totient is φ = 49724617789440.

The previous prime is 72645621402121. The next prime is 72645621402181. The reversal of 72645621402145 is 54120412654627.

It is not a de Polignac number, because 72645621402145 - 2⁷ = 72645621402017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67782201 + ... + 68845609.

It is an arithmetic number, because the mean of its divisors is an integer number (3146728023720).

Almost surely, 2^{72645621402145} is an apocalyptic number.

It is an amenable number.

72645621402145 is a deficient number, since it is larger than the sum of its proper divisors (28049675356895).

72645621402145 is a wasteful number, since it uses less digits than its factorization.

72645621402145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136505.

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 72645621402145 in words is "seventy-two trillion, six hundred forty-five billion, six hundred twenty-one million, four hundred two thousand, one hundred forty-five".