72645621402146 has 8 divisors (see below), whose sum is σ = 117350619188124. Its totient is φ = 33528748339440.

The previous prime is 72645621402121. The next prime is 72645621402181. The reversal of 72645621402146 is 64120412654627.

It can be written as a sum of positive squares in 2 ways, for example, as 70512312859921 + 2133308542225 = 8397161^2 + 1460585^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 72645621402094 and 72645621402103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397031180785 + ... + 1397031180836.

Almost surely, 2^{72645621402146} is an apocalyptic number.

72645621402146 is a deficient number, since it is larger than the sum of its proper divisors (44704997785978).

72645621402146 is a wasteful number, since it uses less digits than its factorization.

72645621402146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794062361636.

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 72645621402146 in words is "seventy-two trillion, six hundred forty-five billion, six hundred twenty-one million, four hundred two thousand, one hundred forty-six".