78353940072 has 32 divisors (see below), whose sum is σ = 201179037600. Its totient is φ = 25412088384.

The previous prime is 78353940059. The next prime is 78353940073. The reversal of 78353940072 is 27004935387.

It is a super-2 number, since 2×78353940072² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78353940073) 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, 44117322 + ... + 44119097.

It is an arithmetic number, because the mean of its divisors is an integer number (6286844925).

Almost surely, 2^78353940072 is an apocalyptic number.

It is an amenable number.

78353940072 is an abundant number, since it is smaller than the sum of its proper divisors (122825097528).

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

78353940072 is a wasteful number, since it uses less digits than its factorization.

78353940072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88236465 (or 88236461 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 78353940072 in words is "seventy-eight billion, three hundred fifty-three million, nine hundred forty thousand, seventy-two".