72345654331 has 2 divisors, whose sum is σ = 72345654332. Its totient is φ = 72345654330.

The previous prime is 72345654301. The next prime is 72345654343. The reversal of 72345654331 is 13345654327.

It is a strong prime.

It is an emirp because it is prime and its reverse (13345654327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72345654331 - 2¹¹ = 72345652283 is a prime.

It is a super-2 number, since 2×72345654331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72345654301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36172827165 + 36172827166.

It is an arithmetic number, because the mean of its divisors is an integer number (36172827166).

Almost surely, 2^72345654331 is an apocalyptic number.

72345654331 is a deficient number, since it is larger than the sum of its proper divisors (1).

72345654331 is an equidigital number, since it uses as much as digits as its factorization.

72345654331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 43.

The spelling of 72345654331 in words is "seventy-two billion, three hundred forty-five million, six hundred fifty-four thousand, three hundred thirty-one".