513456434621 has 8 divisors (see below), whose sum is σ = 563386161240. Its totient is φ = 465017147712.

The previous prime is 513456434591. The next prime is 513456434633. The reversal of 513456434621 is 126434654315.

It can be written as a sum of positive squares in 4 ways, for example, as 118965667396 + 394490767225 = 344914^2 + 628085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 513456434621 - 2²² = 513452240317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513456434681) 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, 372609206 + ... + 372610583.

It is an arithmetic number, because the mean of its divisors is an integer number (70423270155).

Almost surely, 2^513456434621 is an apocalyptic number.

It is an amenable number.

513456434621 is a deficient number, since it is larger than the sum of its proper divisors (49929726619).

513456434621 is a wasteful number, since it uses less digits than its factorization.

513456434621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745219855.

The product of its digits is 1036800, while the sum is 44.

The spelling of 513456434621 in words is "five hundred thirteen billion, four hundred fifty-six million, four hundred thirty-four thousand, six hundred twenty-one".