72746123530 has 8 divisors (see below), whose sum is σ = 130943022372. Its totient is φ = 29098449408.

The previous prime is 72746123509. The next prime is 72746123537. The reversal of 72746123530 is 3532164727.

It can be written as a sum of positive squares in 2 ways, for example, as 71817032169 + 929091361 = 267987^2 + 30481^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72746123537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3637306167 + ... + 3637306186.

Almost surely, 2^72746123530 is an apocalyptic number.

72746123530 is a deficient number, since it is larger than the sum of its proper divisors (58196898842).

72746123530 is a wasteful number, since it uses less digits than its factorization.

72746123530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7274612360.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 72746123530 in words is "seventy-two billion, seven hundred forty-six million, one hundred twenty-three thousand, five hundred thirty".