52557978650 has 12 divisors (see below), whose sum is σ = 97757840382. Its totient is φ = 21023191440.

The previous prime is 52557978593. The next prime is 52557978653. The reversal of 52557978650 is 5687975525.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 46998337681 + 5559640969 = 216791^2 + 74563^2 .

It is a super-2 number, since 2×52557978650² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52557978650.

It is not an unprimeable number, because it can be changed into a prime (52557978653) 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 5 ways as a sum of consecutive naturals, for example, 525579737 + ... + 525579836.

Almost surely, 2^52557978650 is an apocalyptic number.

52557978650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

52557978650 is a deficient number, since it is larger than the sum of its proper divisors (45199861732).

52557978650 is a wasteful number, since it uses less digits than its factorization.

52557978650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051159585 (or 1051159580 counting only the distinct ones).

The product of its (nonzero) digits is 26460000, while the sum is 59.

The spelling of 52557978650 in words is "fifty-two billion, five hundred fifty-seven million, nine hundred seventy-eight thousand, six hundred fifty".