5645506877658 has 12 divisors (see below), whose sum is σ = 12231931568298. Its totient is φ = 1881835625880.

The previous prime is 5645506877657. The next prime is 5645506877693. The reversal of 5645506877658 is 8567786055465.

5645506877658 is a `hidden beast` number, since 5 + 6 + 4 + 550 + 6 + 8 + 7 + 7 + 65 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5641684299729 + 3822577929 = 2375223^2 + 61827^2 .

It is not an unprimeable number, because it can be changed into a prime (5645506877657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156819635473 + ... + 156819635508.

Almost surely, 2^{5645506877658} is an apocalyptic number.

5645506877658 is an abundant number, since it is smaller than the sum of its proper divisors (6586424690640).

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

5645506877658 is a wasteful number, since it uses less digits than its factorization.

5645506877658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313639270989 (or 313639270986 counting only the distinct ones).

The product of its (nonzero) digits is 1693440000, while the sum is 72.

The spelling of 5645506877658 in words is "five trillion, six hundred forty-five billion, five hundred six million, eight hundred seventy-seven thousand, six hundred fifty-eight".