72228540552 has 48 divisors (see below), whose sum is σ = 210052391760. Its totient is φ = 20636725536.

The previous prime is 72228540547. The next prime is 72228540569. The reversal of 72228540552 is 25504582227.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 30708238 + ... + 30710589.

It is an arithmetic number, because the mean of its divisors is an integer number (4376091495).

Almost surely, 2^72228540552 is an apocalyptic number.

It is an amenable number.

72228540552 is an abundant number, since it is smaller than the sum of its proper divisors (137823851208).

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

72228540552 is a wasteful number, since it uses less digits than its factorization.

72228540552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61418850 (or 61418839 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 42.

The spelling of 72228540552 in words is "seventy-two billion, two hundred twenty-eight million, five hundred forty thousand, five hundred fifty-two".