68432491478 has 16 divisors (see below), whose sum is σ = 113241010176. Its totient is φ = 30813879360.

The previous prime is 68432491471. The next prime is 68432491493. The reversal of 68432491478 is 87419423486.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68432491471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32096726 + ... + 32098857.

It is an arithmetic number, because the mean of its divisors is an integer number (7077563136).

Almost surely, 2^68432491478 is an apocalyptic number.

68432491478 is a deficient number, since it is larger than the sum of its proper divisors (44808518698).

68432491478 is a wasteful number, since it uses less digits than its factorization.

68432491478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64195639.

The product of its digits is 9289728, while the sum is 56.

The spelling of 68432491478 in words is "sixty-eight billion, four hundred thirty-two million, four hundred ninety-one thousand, four hundred seventy-eight".