68457537 has 6 divisors (see below), whose sum is σ = 98883122. Its totient is φ = 45638352.

The previous prime is 68457533. The next prime is 68457539. The reversal of 68457537 is 73575486.

68457537 is a `hidden beast` number, since 68 + 4 + 57 + 537 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62869041 + 5588496 = 7929^2 + 2364^2 .

It is not a de Polignac number, because 68457537 - 2² = 68457533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68457492 and 68457501.

It is not an unprimeable number, because it can be changed into a prime (68457533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3803188 + ... + 3803205.

Almost surely, 2^68457537 is an apocalyptic number.

It is an amenable number.

68457537 is a deficient number, since it is larger than the sum of its proper divisors (30425585).

68457537 is a wasteful number, since it uses less digits than its factorization.

68457537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7606399 (or 7606396 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 68457537 is about 8273.9069973018. The cubic root of 68457537 is about 409.0789098568.

The spelling of 68457537 in words is "sixty-eight million, four hundred fifty-seven thousand, five hundred thirty-seven".