772117046821 has 16 divisors (see below), whose sum is σ = 820859857920. Its totient is φ = 723748896000.

The previous prime is 772117046819. The next prime is 772117046843. The reversal of 772117046821 is 128640711277.

It is a cyclic number.

It is not a de Polignac number, because 772117046821 - 2¹ = 772117046819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772117046891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4603095 + ... + 4767883.

It is an arithmetic number, because the mean of its divisors is an integer number (51303741120).

Almost surely, 2^772117046821 is an apocalyptic number.

It is an amenable number.

772117046821 is a deficient number, since it is larger than the sum of its proper divisors (48742811099).

772117046821 is a wasteful number, since it uses less digits than its factorization.

772117046821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165924.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 772117046821 in words is "seven hundred seventy-two billion, one hundred seventeen million, forty-six thousand, eight hundred twenty-one".