70814447778 has 32 divisors (see below), whose sum is σ = 145491330816. Its totient is φ = 22961380608.

The previous prime is 70814447771. The next prime is 70814447827. The reversal of 70814447778 is 87774441807.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70814447771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955050 + ... + 1026522.

It is an arithmetic number, because the mean of its divisors is an integer number (4546604088).

Almost surely, 2^70814447778 is an apocalyptic number.

70814447778 is an abundant number, since it is smaller than the sum of its proper divisors (74676883038).

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

70814447778 is a wasteful number, since it uses less digits than its factorization.

70814447778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75978.

The product of its (nonzero) digits is 9834496, while the sum is 57.

The spelling of 70814447778 in words is "seventy billion, eight hundred fourteen million, four hundred forty-seven thousand, seven hundred seventy-eight".