77755101144 has 32 divisors (see below), whose sum is σ = 222157432320. Its totient is φ = 22215743136.

The previous prime is 77755101131. The next prime is 77755101161. The reversal of 77755101144 is 44110155777.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 77755101096 and 77755101105.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 231413824 + ... + 231414159.

It is an arithmetic number, because the mean of its divisors is an integer number (6942419760).

Almost surely, 2^77755101144 is an apocalyptic number.

It is an amenable number.

77755101144 is an abundant number, since it is smaller than the sum of its proper divisors (144402331176).

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

77755101144 is a wasteful number, since it uses less digits than its factorization.

77755101144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462827999 (or 462827995 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 42.

The spelling of 77755101144 in words is "seventy-seven billion, seven hundred fifty-five million, one hundred one thousand, one hundred forty-four".