68898787898990 has 16 divisors (see below), whose sum is σ = 141734649392352. Its totient is φ = 23622441565344.

The previous prime is 68898787898959. The next prime is 68898787899001. The reversal of 68898787898990 is 9989878789886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492134199209 + ... + 492134199348.

It is an arithmetic number, because the mean of its divisors is an integer number (8858415587022).

Almost surely, 2^{68898787898990} is an apocalyptic number.

68898787898990 is an abundant number, since it is smaller than the sum of its proper divisors (72835861493362).

68898787898990 is a wasteful number, since it uses less digits than its factorization.

68898787898990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984268398571.

The product of its (nonzero) digits is 505658474496, while the sum is 104.

The spelling of 68898787898990 in words is "sixty-eight trillion, eight hundred ninety-eight billion, seven hundred eighty-seven million, eight hundred ninety-eight thousand, nine hundred ninety".