68451543 has 6 divisors (see below), whose sum is σ = 98874464. Its totient is φ = 45634356.

The previous prime is 68451541. The next prime is 68451553. The reversal of 68451543 is 34515486.

It is a happy number.

68451543 is a `hidden beast` number, since 68 + 4 + 51 + 543 = 666.

It is not a de Polignac number, because 68451543 - 2¹ = 68451541 is a prime.

It is a super-2 number, since 2×68451543² = 9371227478161698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68451498 and 68451507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68451541) 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, 3802855 + ... + 3802872.

Almost surely, 2^68451543 is an apocalyptic number.

68451543 is a deficient number, since it is larger than the sum of its proper divisors (30422921).

68451543 is a wasteful number, since it uses less digits than its factorization.

68451543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605733 (or 7605730 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 68451543 is about 8273.5447663018. The cubic root of 68451543 is about 409.0669701413.

The spelling of 68451543 in words is "sixty-eight million, four hundred fifty-one thousand, five hundred forty-three".