68081542 has 4 divisors (see below), whose sum is σ = 102122316. Its totient is φ = 34040770.

The previous prime is 68081537. The next prime is 68081543. The reversal of 68081542 is 24518086.

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

It is a super-2 number, since 2×68081542² = 9270192722195528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68081498 and 68081507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68081543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17020384 + ... + 17020387.

It is an arithmetic number, because the mean of its divisors is an integer number (25530579).

Almost surely, 2^68081542 is an apocalyptic number.

68081542 is a deficient number, since it is larger than the sum of its proper divisors (34040774).

68081542 is a wasteful number, since it uses less digits than its factorization.

68081542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34040773.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 68081542 is about 8251.1539798988. The cubic root of 68081542 is about 408.3285951785.

The spelling of 68081542 in words is "sixty-eight million, eighty-one thousand, five hundred forty-two".