72391392648 has 48 divisors (see below), whose sum is σ = 197075914620. Its totient is φ = 24005431296.

The previous prime is 72391392583. The next prime is 72391392691. The reversal of 72391392648 is 84629319327.

It can be written as a sum of positive squares in 2 ways, for example, as 70054443684 + 2336948964 = 264678^2 + 48342^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72391392594 and 72391392603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2590861 + ... + 2618652.

Almost surely, 2^72391392648 is an apocalyptic number.

It is an amenable number.

72391392648 is an abundant number, since it is smaller than the sum of its proper divisors (124684521972).

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

72391392648 is a wasteful number, since it uses less digits than its factorization.

72391392648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5209718 (or 5209711 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 72391392648 in words is "seventy-two billion, three hundred ninety-one million, three hundred ninety-two thousand, six hundred forty-eight".