77710077040 has 20 divisors (see below), whose sum is σ = 180675929304. Its totient is φ = 31084030784.

The previous prime is 77710077031. The next prime is 77710077043. The reversal of 77710077040 is 4077001777.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 77710076984 and 77710077002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77710077043) 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, 485687902 + ... + 485688061.

Almost surely, 2^77710077040 is an apocalyptic number.

It is an amenable number.

77710077040 is an abundant number, since it is smaller than the sum of its proper divisors (102965852264).

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

77710077040 is a wasteful number, since it uses less digits than its factorization.

77710077040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971375976 (or 971375970 counting only the distinct ones).

The product of its (nonzero) digits is 67228, while the sum is 40.

The spelling of 77710077040 in words is "seventy-seven billion, seven hundred ten million, seventy-seven thousand, forty".