72278755247 has 32 divisors (see below), whose sum is σ = 78938608320. Its totient is φ = 65956101120.

The previous prime is 72278755231. The next prime is 72278755253. The reversal of 72278755247 is 74255787227.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72278755247 - 2⁴ = 72278755231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72278755192 and 72278755201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278755207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52642253 + ... + 52643625.

It is an arithmetic number, because the mean of its divisors is an integer number (2466831510).

Almost surely, 2^72278755247 is an apocalyptic number.

72278755247 is a deficient number, since it is larger than the sum of its proper divisors (6659853073).

72278755247 is a wasteful number, since it uses less digits than its factorization.

72278755247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363.

The product of its digits is 15366400, while the sum is 56.

The spelling of 72278755247 in words is "seventy-two billion, two hundred seventy-eight million, seven hundred fifty-five thousand, two hundred forty-seven".