77864019733 has 16 divisors (see below), whose sum is σ = 79246356480. Its totient is φ = 76494986496.

The previous prime is 77864019721. The next prime is 77864019767. The reversal of 77864019733 is 33791046877.

It is a cyclic number.

It is not a de Polignac number, because 77864019733 - 2³³ = 69274085141 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 (77864017733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18746785 + ... + 18750937.

It is an arithmetic number, because the mean of its divisors is an integer number (4952897280).

Almost surely, 2^77864019733 is an apocalyptic number.

It is an amenable number.

77864019733 is a deficient number, since it is larger than the sum of its proper divisors (1382336747).

77864019733 is a wasteful number, since it uses less digits than its factorization.

77864019733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 77864019733 in words is "seventy-seven billion, eight hundred sixty-four million, nineteen thousand, seven hundred thirty-three".