72474647427 has 64 divisors (see below), whose sum is σ = 132203688960. Its totient is φ = 38212134912.

The previous prime is 72474647423. The next prime is 72474647429.

72474647427 is a `hidden beast` number, since 72 + 47 + 46 + 474 + 27 = 666.

72474647427 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72474647427 - 2² = 72474647423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72474647423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7702908 + ... + 7712310.

It is an arithmetic number, because the mean of its divisors is an integer number (2065682640).

Almost surely, 2^72474647427 is an apocalyptic number.

72474647427 is a deficient number, since it is larger than the sum of its proper divisors (59729041533).

72474647427 is a wasteful number, since it uses less digits than its factorization.

72474647427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12569 (or 12563 counting only the distinct ones).

The product of its digits is 14751744, while the sum is 54.

The spelling of 72474647427 in words is "seventy-two billion, four hundred seventy-four million, six hundred forty-seven thousand, four hundred twenty-seven".