78916944406 has 8 divisors (see below), whose sum is σ = 118546728984. Its totient is φ = 39401368080.

The previous prime is 78916944371. The next prime is 78916944419. The reversal of 78916944406 is 60444961987.

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

It is a super-2 number, since 2×78916944406² (a number of 23 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, 28550335 + ... + 28553098.

It is an arithmetic number, because the mean of its divisors is an integer number (14818341123).

Almost surely, 2^78916944406 is an apocalyptic number.

78916944406 is a deficient number, since it is larger than the sum of its proper divisors (39629784578).

78916944406 is a wasteful number, since it uses less digits than its factorization.

78916944406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57104126.

The product of its (nonzero) digits is 10450944, while the sum is 58.

It can be divided in two parts, 7891694 and 4406, that added together give a square (7896100 = 2810²).

The spelling of 78916944406 in words is "seventy-eight billion, nine hundred sixteen million, nine hundred forty-four thousand, four hundred six".