51563240263306 has 4 divisors (see below), whose sum is σ = 77344860394962. Its totient is φ = 25781620131652.

The previous prime is 51563240263277. The next prime is 51563240263351. The reversal of 51563240263306 is 60336204236515.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47649407151025 + 3913833112281 = 6902855^2 + 1978341^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12890810065825 + ... + 12890810065828.

Almost surely, 2^{51563240263306} is an apocalyptic number.

51563240263306 is a deficient number, since it is larger than the sum of its proper divisors (25781620131656).

51563240263306 is a wasteful number, since it uses less digits than its factorization.

51563240263306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25781620131655.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 51563240263306 in words is "fifty-one trillion, five hundred sixty-three billion, two hundred forty million, two hundred sixty-three thousand, three hundred six".