72278216372 has 24 divisors (see below), whose sum is σ = 128509065216. Its totient is φ = 35564730368.

The previous prime is 72278216363. The next prime is 72278216389. The reversal of 72278216372 is 27361287227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338228 + ... + 508875.

It is an arithmetic number, because the mean of its divisors is an integer number (5354544384).

Almost surely, 2^72278216372 is an apocalyptic number.

It is an amenable number.

72278216372 is a deficient number, since it is larger than the sum of its proper divisors (56230848844).

72278216372 is a wasteful number, since it uses less digits than its factorization.

72278216372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847447 (or 847445 counting only the distinct ones).

The product of its digits is 790272, while the sum is 47.

The spelling of 72278216372 in words is "seventy-two billion, two hundred seventy-eight million, two hundred sixteen thousand, three hundred seventy-two".