77940555286 has 16 divisors (see below), whose sum is σ = 127575357840. Its totient is φ = 35417450880.

The previous prime is 77940555283. The next prime is 77940555307. The reversal of 77940555286 is 68255504977.

It is a self number, because there is not a number n which added to its sum of digits gives 77940555286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77940555283) 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 7 ways as a sum of consecutive naturals, for example, 424311 + ... + 579586.

It is an arithmetic number, because the mean of its divisors is an integer number (7973459865).

Almost surely, 2^77940555286 is an apocalyptic number.

77940555286 is a deficient number, since it is larger than the sum of its proper divisors (49634802554).

77940555286 is a wasteful number, since it uses less digits than its factorization.

77940555286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007439.

The product of its (nonzero) digits is 21168000, while the sum is 58.

The spelling of 77940555286 in words is "seventy-seven billion, nine hundred forty million, five hundred fifty-five thousand, two hundred eighty-six".