77242942087 has 4 divisors (see below), whose sum is σ = 77336344296. Its totient is φ = 77149539880.

The previous prime is 77242942061. The next prime is 77242942097. The reversal of 77242942087 is 78024924277.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 77242942087 - 2⁷ = 77242941959 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 (77242942097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46699864 + ... + 46701517.

It is an arithmetic number, because the mean of its divisors is an integer number (19334086074).

Almost surely, 2^77242942087 is an apocalyptic number.

77242942087 is a deficient number, since it is larger than the sum of its proper divisors (93402209).

77242942087 is an equidigital number, since it uses as much as digits as its factorization.

77242942087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93402208.

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 77242942087 in words is "seventy-seven billion, two hundred forty-two million, nine hundred forty-two thousand, eighty-seven".