51506644450 has 12 divisors (see below), whose sum is σ = 95802358770. Its totient is φ = 20602657760.

The previous prime is 51506644447. The next prime is 51506644457. The reversal of 51506644450 is 5444660515.

51506644450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 21997932489 + 29508711961 = 148317^2 + 171781^2 .

It is not an unprimeable number, because it can be changed into a prime (51506644457) 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, 515066395 + ... + 515066494.

Almost surely, 2^51506644450 is an apocalyptic number.

51506644450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51506644450 is a deficient number, since it is larger than the sum of its proper divisors (44295714320).

51506644450 is a wasteful number, since it uses less digits than its factorization.

51506644450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030132901 (or 1030132896 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 51506644450 in words is "fifty-one billion, five hundred six million, six hundred forty-four thousand, four hundred fifty".