72078643698 has 8 divisors (see below), whose sum is σ = 144157287408. Its totient is φ = 24026214564.

The previous prime is 72078643691. The next prime is 72078643699. The reversal of 72078643698 is 89634687027.

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

72078643698 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72078643691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6006553636 + ... + 6006553647.

It is an arithmetic number, because the mean of its divisors is an integer number (18019660926).

Almost surely, 2^72078643698 is an apocalyptic number.

72078643698 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.

72078643698 is a wasteful number, since it uses less digits than its factorization.

72078643698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013107288.

The product of its (nonzero) digits is 24385536, while the sum is 60.

The spelling of 72078643698 in words is "seventy-two billion, seventy-eight million, six hundred forty-three thousand, six hundred ninety-eight".