56391499250 has 16 divisors (see below), whose sum is σ = 105564887064. Its totient is φ = 22556599600.

The previous prime is 56391499247. The next prime is 56391499259. The reversal of 56391499250 is 5299419365.

It can be written as a sum of positive squares in 4 ways, for example, as 25334133889 + 31057365361 = 159167^2 + 176231^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56391499192 and 56391499201.

It is not an unprimeable number, because it can be changed into a prime (56391499259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112782749 + ... + 112783248.

Almost surely, 2^56391499250 is an apocalyptic number.

56391499250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56391499250 is a deficient number, since it is larger than the sum of its proper divisors (49173387814).

56391499250 is a wasteful number, since it uses less digits than its factorization.

56391499250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225566014 (or 225566004 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 56391499250 in words is "fifty-six billion, three hundred ninety-one million, four hundred ninety-nine thousand, two hundred fifty".