42645878577 has 12 divisors (see below), whose sum is σ = 61912293300. Its totient is φ = 28286266848.

The previous prime is 42645878533. The next prime is 42645878603. The reversal of 42645878577 is 77587854624.

It is a happy number.

42645878577 is a `hidden beast` number, since 4 + 2 + 6 + 4 + 58 + 7 + 8 + 577 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22796168256 + 19849710321 = 150984^2 + 140889^2 .

It is not a de Polignac number, because 42645878577 - 2¹⁰ = 42645877553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42645838577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12024702 + ... + 12028247.

It is an arithmetic number, because the mean of its divisors is an integer number (5159357775).

Almost surely, 2^42645878577 is an apocalyptic number.

It is an amenable number.

42645878577 is a deficient number, since it is larger than the sum of its proper divisors (19266414723).

42645878577 is a wasteful number, since it uses less digits than its factorization.

42645878577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24053152 (or 24053149 counting only the distinct ones).

The product of its digits is 105369600, while the sum is 63.

The spelling of 42645878577 in words is "forty-two billion, six hundred forty-five million, eight hundred seventy-eight thousand, five hundred seventy-seven".