70851780138 has 16 divisors (see below), whose sum is σ = 141951734496. Its totient is φ = 23575897680.

The previous prime is 70851780133. The next prime is 70851780151. The reversal of 70851780138 is 83108715807.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (70851780133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10336881 + ... + 10343732.

It is an arithmetic number, because the mean of its divisors is an integer number (8871983406).

Almost surely, 2^70851780138 is an apocalyptic number.

70851780138 is an abundant number, since it is smaller than the sum of its proper divisors (71099954358).

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

70851780138 is a wasteful number, since it uses less digits than its factorization.

70851780138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20681189.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 70851780138 in words is "seventy billion, eight hundred fifty-one million, seven hundred eighty thousand, one hundred thirty-eight".