72054645427 has 4 divisors (see below), whose sum is σ = 72055812280. Its totient is φ = 72053478576.

The previous prime is 72054645379. The next prime is 72054645473. The reversal of 72054645427 is 72454645027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72054645427 - 2¹¹ = 72054643379 is a prime.

It is a super-2 number, since 2×72054645427² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72054645127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485298 + ... + 616135.

It is an arithmetic number, because the mean of its divisors is an integer number (18013953070).

Almost surely, 2^72054645427 is an apocalyptic number.

72054645427 is a deficient number, since it is larger than the sum of its proper divisors (1166853).

72054645427 is a wasteful number, since it uses less digits than its factorization.

72054645427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166852.

The product of its (nonzero) digits is 1881600, while the sum is 46.

The spelling of 72054645427 in words is "seventy-two billion, fifty-four million, six hundred forty-five thousand, four hundred twenty-seven".