72169773284 has 18 divisors (see below), whose sum is σ = 146917038870. Its totient is φ = 30929902752.

The previous prime is 72169773271. The next prime is 72169773367. The reversal of 72169773284 is 48237796127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38416000000 + 33753773284 = 196000^2 + 183722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184106369 + ... + 184106760.

It is an arithmetic number, because the mean of its divisors is an integer number (8162057715).

Almost surely, 2^72169773284 is an apocalyptic number.

It is an amenable number.

72169773284 is an abundant number, since it is smaller than the sum of its proper divisors (74747265586).

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

72169773284 is a wasteful number, since it uses less digits than its factorization.

72169773284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368213147 (or 368213138 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 56.

The spelling of 72169773284 in words is "seventy-two billion, one hundred sixty-nine million, seven hundred seventy-three thousand, two hundred eighty-four".