821077078372 has 12 divisors (see below), whose sum is σ = 1436891638896. Its totient is φ = 410536610120.

The previous prime is 821077078369. The next prime is 821077078433. The reversal of 821077078372 is 273870770128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944247 + ... + 1591777.

It is an arithmetic number, because the mean of its divisors is an integer number (119740969908).

Almost surely, 2^821077078372 is an apocalyptic number.

It is an amenable number.

821077078372 is a deficient number, since it is larger than the sum of its proper divisors (615814560524).

821077078372 is a wasteful number, since it uses less digits than its factorization.

821077078372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964538 (or 964536 counting only the distinct ones).

The product of its (nonzero) digits is 1843968, while the sum is 52.

The spelling of 821077078372 in words is "eight hundred twenty-one billion, seventy-seven million, seventy-eight thousand, three hundred seventy-two".