78346786890 has 16 divisors (see below), whose sum is σ = 188032288608. Its totient is φ = 20892476496.

The previous prime is 78346786883. The next prime is 78346786907. The reversal of 78346786890 is 9868764387.

It is a super-2 number, since 2×78346786890² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1305779752 + ... + 1305779811.

It is an arithmetic number, because the mean of its divisors is an integer number (11752018038).

Almost surely, 2^78346786890 is an apocalyptic number.

78346786890 is an abundant number, since it is smaller than the sum of its proper divisors (109685501718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78346786890 is a wasteful number, since it uses less digits than its factorization.

78346786890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611559573.

The product of its (nonzero) digits is 97542144, while the sum is 66.

The spelling of 78346786890 in words is "seventy-eight billion, three hundred forty-six million, seven hundred eighty-six thousand, eight hundred ninety".