77861540106 has 48 divisors (see below), whose sum is σ = 192930648768. Its totient is φ = 22231080000.

The previous prime is 77861540093. The next prime is 77861540123. The reversal of 77861540106 is 60104516877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22020 + ... + 395231.

It is an arithmetic number, because the mean of its divisors is an integer number (4019388516).

Almost surely, 2^77861540106 is an apocalyptic number.

77861540106 is an abundant number, since it is smaller than the sum of its proper divisors (115069108662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77861540106 is a wasteful number, since it uses less digits than its factorization.

77861540106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418747 (or 418744 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 77861540106 in words is "seventy-seven billion, eight hundred sixty-one million, five hundred forty thousand, one hundred six".