68153686490 has 16 divisors (see below), whose sum is σ = 122757212448. Its totient is φ = 27243568656.

The previous prime is 68153686481. The next prime is 68153686501. The reversal of 68153686490 is 9468635186.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2222252 + ... + 2252711.

It is an arithmetic number, because the mean of its divisors is an integer number (7672325778).

Almost surely, 2^68153686490 is an apocalyptic number.

68153686490 is a deficient number, since it is larger than the sum of its proper divisors (54603525958).

68153686490 is a wasteful number, since it uses less digits than its factorization.

68153686490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476493.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 68153686490 in words is "sixty-eight billion, one hundred fifty-three million, six hundred eighty-six thousand, four hundred ninety".