77045505120 has 72 divisors (see below), whose sum is σ = 262917791136. Its totient is φ = 20545467648.

The previous prime is 77045505109. The next prime is 77045505151. The reversal of 77045505120 is 2150554077.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26750472 + ... + 26753351.

It is an arithmetic number, because the mean of its divisors is an integer number (3651635988).

Almost surely, 2^77045505120 is an apocalyptic number.

It is an amenable number.

77045505120 is an abundant number, since it is smaller than the sum of its proper divisors (185872286016).

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

77045505120 is a wasteful number, since it uses less digits than its factorization.

77045505120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53503844 (or 53503833 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 36.

The spelling of 77045505120 in words is "seventy-seven billion, forty-five million, five hundred five thousand, one hundred twenty".