68721562 has 32 divisors (see below), whose sum is σ = 132394752. Its totient is φ = 26002944.

The previous prime is 68721551. The next prime is 68721571. The reversal of 68721562 is 26512786.

It is a happy number.

It is a super-3 number, since 3×68721562³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4023 + ... + 12394.

It is an arithmetic number, because the mean of its divisors is an integer number (4137336).

Almost surely, 2^68721562 is an apocalyptic number.

68721562 is a deficient number, since it is larger than the sum of its proper divisors (63673190).

68721562 is a wasteful number, since it uses less digits than its factorization.

68721562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16462.

The product of its digits is 40320, while the sum is 37.

The square root of 68721562 is about 8289.8469225915. The cubic root of 68721562 is about 409.6041430054.

The spelling of 68721562 in words is "sixty-eight million, seven hundred twenty-one thousand, five hundred sixty-two".