78470461978 has 8 divisors (see below), whose sum is σ = 118084168800. Its totient is φ = 39109072380.

The previous prime is 78470461943. The next prime is 78470461997. The reversal of 78470461978 is 87916407487.

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

It is a super-2 number, since 2×78470461978² (a number of 23 digits) contains 22 as substring.

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, 63078528 + ... + 63079771.

It is an arithmetic number, because the mean of its divisors is an integer number (14760521100).

Almost surely, 2^78470461978 is an apocalyptic number.

78470461978 is a deficient number, since it is larger than the sum of its proper divisors (39613706822).

78470461978 is a wasteful number, since it uses less digits than its factorization.

78470461978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126158612.

The product of its (nonzero) digits is 18966528, while the sum is 61.

The spelling of 78470461978 in words is "seventy-eight billion, four hundred seventy million, four hundred sixty-one thousand, nine hundred seventy-eight".