72643827225 has 24 divisors (see below), whose sum is σ = 120186291712. Its totient is φ = 38716977600.

The previous prime is 72643827199. The next prime is 72643827239. The reversal of 72643827225 is 52272834627.

It is not a de Polignac number, because 72643827225 - 2¹² = 72643823129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218902 + ... + 439551.

Almost surely, 2^72643827225 is an apocalyptic number.

72643827225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72643827225 is a deficient number, since it is larger than the sum of its proper divisors (47542464487).

72643827225 is a wasteful number, since it uses less digits than its factorization.

72643827225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659937 (or 659932 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 48.

The spelling of 72643827225 in words is "seventy-two billion, six hundred forty-three million, eight hundred twenty-seven thousand, two hundred twenty-five".