78556647016 has 32 divisors (see below), whose sum is σ = 153723335040. Its totient is φ = 37564325568.

The previous prime is 78556646983. The next prime is 78556647017. The reversal of 78556647016 is 61074665587.

It is a super-2 number, since 2×78556647016² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78556647017) by changing a digit.

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, 1189045 + ... + 1253371.

It is an arithmetic number, because the mean of its divisors is an integer number (4803854220).

Almost surely, 2^78556647016 is an apocalyptic number.

It is an amenable number.

78556647016 is a deficient number, since it is larger than the sum of its proper divisors (75166688024).

78556647016 is a wasteful number, since it uses less digits than its factorization.

78556647016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70993 (or 70989 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 78556647016 in words is "seventy-eight billion, five hundred fifty-six million, six hundred forty-seven thousand, sixteen".