513240650064 has 60 divisors (see below), whose sum is σ = 1436662100692. Its totient is φ = 171044352000.

The previous prime is 513240650009. The next prime is 513240650081. The reversal of 513240650064 is 460056042315.

513240650064 is a `hidden beast` number, since 51 + 3 + 2 + 40 + 6 + 500 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 387371801664 + 125868848400 = 622392^2 + 354780^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320154 + ... + 1062534.

Almost surely, 2^513240650064 is an apocalyptic number.

It is an amenable number.

513240650064 is an abundant number, since it is smaller than the sum of its proper divisors (923421450628).

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

513240650064 is a wasteful number, since it uses less digits than its factorization.

513240650064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747196 (or 747187 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 513240650064 its reverse (460056042315), we get a palindrome (973296692379).

The spelling of 513240650064 in words is "five hundred thirteen billion, two hundred forty million, six hundred fifty thousand, sixty-four".