72497479427 has 8 divisors (see below), whose sum is σ = 73573770240. Its totient is φ = 71425153800.

The previous prime is 72497479403. The next prime is 72497479433.

72497479427 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 72497479427 - 2¹² = 72497475331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72497479427.

It is not an unprimeable number, because it can be changed into a prime (72497479477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954449 + ... + 1027602.

It is an arithmetic number, because the mean of its divisors is an integer number (9196721280).

Almost surely, 2^72497479427 is an apocalyptic number.

72497479427 is a deficient number, since it is larger than the sum of its proper divisors (1076290813).

72497479427 is a wasteful number, since it uses less digits than its factorization.

72497479427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982593.

The product of its digits is 49787136, while the sum is 62.

The spelling of 72497479427 in words is "seventy-two billion, four hundred ninety-seven million, four hundred seventy-nine thousand, four hundred twenty-seven".