77907553545 has 32 divisors (see below), whose sum is σ = 132486681600. Its totient is φ = 38981628864.

The previous prime is 77907553523. The next prime is 77907553547. The reversal of 77907553545 is 54535570977.

It is not a de Polignac number, because 77907553545 - 2⁷ = 77907553417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (77907553547) 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 31 ways as a sum of consecutive naturals, for example, 1297635 + ... + 1356344.

It is an arithmetic number, because the mean of its divisors is an integer number (4140208800).

Almost surely, 2^77907553545 is an apocalyptic number.

It is an amenable number.

77907553545 is a deficient number, since it is larger than the sum of its proper divisors (54579128055).

77907553545 is a wasteful number, since it uses less digits than its factorization.

77907553545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654109.

The product of its (nonzero) digits is 23152500, while the sum is 57.

The spelling of 77907553545 in words is "seventy-seven billion, nine hundred seven million, five hundred fifty-three thousand, five hundred forty-five".