68540562 has 48 divisors (see below), whose sum is σ = 157865760. Its totient is φ = 21430656.

The previous prime is 68540557. The next prime is 68540567. The reversal of 68540562 is 26504586.

68540562 is a `hidden beast` number, since 68 + 540 + 56 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (68540557) and next prime (68540567).

It is not an unprimeable number, because it can be changed into a prime (68540567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35658 + ... + 37530.

It is an arithmetic number, because the mean of its divisors is an integer number (3288870).

Almost surely, 2^68540562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68540562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78932880).

68540562 is an abundant number, since it is smaller than the sum of its proper divisors (89325198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68540562 is a wasteful number, since it uses less digits than its factorization.

68540562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007 (or 2004 counting only the distinct ones).

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

The square root of 68540562 is about 8278.9227560112. The cubic root of 68540562 is about 409.2442194139.

The spelling of 68540562 in words is "sixty-eight million, five hundred forty thousand, five hundred sixty-two".