51240553040 has 20 divisors (see below), whose sum is σ = 119134286004. Its totient is φ = 20496221184.

The previous prime is 51240553037. The next prime is 51240553057. The reversal of 51240553040 is 4035504215.

51240553040 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 2 ways, for example, as 31839406096 + 19401146944 = 178436^2 + 139288^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 51240552994 and 51240553012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320253377 + ... + 320253536.

Almost surely, 2^51240553040 is an apocalyptic number.

It is an amenable number.

51240553040 is an abundant number, since it is smaller than the sum of its proper divisors (67893732964).

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

51240553040 is a wasteful number, since it uses less digits than its factorization.

51240553040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640506926 (or 640506920 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The spelling of 51240553040 in words is "fifty-one billion, two hundred forty million, five hundred fifty-three thousand, forty".