68403991886 has 8 divisors (see below), whose sum is σ = 105108573024. Its totient is φ = 33367800880.

The previous prime is 68403991879. The next prime is 68403991891. The reversal of 68403991886 is 68819930486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×68403991886² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417097430 + ... + 417097593.

It is an arithmetic number, because the mean of its divisors is an integer number (13138571628).

Almost surely, 2^68403991886 is an apocalyptic number.

68403991886 is a deficient number, since it is larger than the sum of its proper divisors (36704581138).

68403991886 is a wasteful number, since it uses less digits than its factorization.

68403991886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834195066.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 68403991886 in words is "sixty-eight billion, four hundred three million, nine hundred ninety-one thousand, eight hundred eighty-six".