72776821832 has 64 divisors (see below), whose sum is σ = 160390359360. Its totient is φ = 30520915200.

The previous prime is 72776821813. The next prime is 72776821853. The reversal of 72776821832 is 23812867727.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2526503 + ... + 2555145.

It is an arithmetic number, because the mean of its divisors is an integer number (2506099365).

Almost surely, 2^72776821832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72776821832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80195179680).

72776821832 is an abundant number, since it is smaller than the sum of its proper divisors (87613537528).

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

72776821832 is a wasteful number, since it uses less digits than its factorization.

72776821832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30894 (or 30890 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 53.

The spelling of 72776821832 in words is "seventy-two billion, seven hundred seventy-six million, eight hundred twenty-one thousand, eight hundred thirty-two".