67816687490 has 16 divisors (see below), whose sum is σ = 127377430848. Its totient is φ = 25947254256.

The previous prime is 67816687459. The next prime is 67816687507. The reversal of 67816687490 is 9478661876.

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, 147427352 + ... + 147427811.

It is an arithmetic number, because the mean of its divisors is an integer number (7961089428).

Almost surely, 2^67816687490 is an apocalyptic number.

67816687490 is a deficient number, since it is larger than the sum of its proper divisors (59560743358).

67816687490 is a wasteful number, since it uses less digits than its factorization.

67816687490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294855193.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 67816687490 in words is "sixty-seven billion, eight hundred sixteen million, six hundred eighty-seven thousand, four hundred ninety".