72494727551 has 4 divisors (see below), whose sum is σ = 72496470000. Its totient is φ = 72492985104.

The previous prime is 72494727533. The next prime is 72494727637. The reversal of 72494727551 is 15572749427.

It is a happy number.

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 72494727551 - 2¹⁰ = 72494726527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72494727493 and 72494727502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72494727511) 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, 807251 + ... + 892548.

It is an arithmetic number, because the mean of its divisors is an integer number (18124117500).

Almost surely, 2^72494727551 is an apocalyptic number.

72494727551 is a deficient number, since it is larger than the sum of its proper divisors (1742449).

72494727551 is a wasteful number, since it uses less digits than its factorization.

72494727551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742448.

The product of its digits is 4939200, while the sum is 53.

The spelling of 72494727551 in words is "seventy-two billion, four hundred ninety-four million, seven hundred twenty-seven thousand, five hundred fifty-one".