72651447 has 24 divisors (see below), whose sum is σ = 114761088. Its totient is φ = 43923600.

The previous prime is 72651437. The next prime is 72651451. The reversal of 72651447 is 74415627.

It is not a de Polignac number, because 72651447 - 2²² = 68457143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72651407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61888 + ... + 63050.

It is an arithmetic number, because the mean of its divisors is an integer number (4781712).

Almost surely, 2^72651447 is an apocalyptic number.

72651447 is a deficient number, since it is larger than the sum of its proper divisors (42109641).

72651447 is a wasteful number, since it uses less digits than its factorization.

72651447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1808 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 72651447 is about 8523.5818175225. The cubic root of 72651447 is about 417.2676886551.

The spelling of 72651447 in words is "seventy-two million, six hundred fifty-one thousand, four hundred forty-seven".