68151998 has 12 divisors (see below), whose sum is σ = 103790232. Its totient is φ = 33562980.

The previous prime is 68151991. The next prime is 68152009. The reversal of 68151998 is 89915186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68151991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5183 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (8649186).

Almost surely, 2^68151998 is an apocalyptic number.

68151998 is a deficient number, since it is larger than the sum of its proper divisors (35638234).

68151998 is an equidigital number, since it uses as much as digits as its factorization.

68151998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7727 (or 7660 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The square root of 68151998 is about 8255.4223392871. The cubic root of 68151998 is about 408.4694031967.

The spelling of 68151998 in words is "sixty-eight million, one hundred fifty-one thousand, nine hundred ninety-eight".