83640167778 has 8 divisors (see below), whose sum is σ = 167280335568. Its totient is φ = 27880055924.

The previous prime is 83640167747. The next prime is 83640167789. The reversal of 83640167778 is 87776104638.

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

83640167778 is an admirable 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, 6970013976 + ... + 6970013987.

It is an arithmetic number, because the mean of its divisors is an integer number (20910041946).

Almost surely, 2^83640167778 is an apocalyptic number.

83640167778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

83640167778 is a wasteful number, since it uses less digits than its factorization.

83640167778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13940027968.

The product of its (nonzero) digits is 9483264, while the sum is 57.

The spelling of 83640167778 in words is "eighty-three billion, six hundred forty million, one hundred sixty-seven thousand, seven hundred seventy-eight".