77309220887 has 8 divisors (see below), whose sum is σ = 80068184400. Its totient is φ = 74556465984.

The previous prime is 77309220841. The next prime is 77309220941. The reversal of 77309220887 is 78802290377.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77309220887 - 2¹⁸ = 77308958743 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 (77309220487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1526798 + ... + 1576619.

It is an arithmetic number, because the mean of its divisors is an integer number (10008523050).

Almost surely, 2^77309220887 is an apocalyptic number.

77309220887 is a deficient number, since it is larger than the sum of its proper divisors (2758963513).

77309220887 is a wasteful number, since it uses less digits than its factorization.

77309220887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104305.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 77309220887 in words is "seventy-seven billion, three hundred nine million, two hundred twenty thousand, eight hundred eighty-seven".