520725403537 has 4 divisors (see below), whose sum is σ = 520741891440. Its totient is φ = 520708915636.

The previous prime is 520725403463. The next prime is 520725403567. The reversal of 520725403537 is 735304527025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520725403537 - 2⁷ = 520725403409 is a prime.

It is a super-2 number, since 2×520725403537² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520725403493 and 520725403502.

It is not an unprimeable number, because it can be changed into a prime (520725403567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8196487 + ... + 8259772.

It is an arithmetic number, because the mean of its divisors is an integer number (130185472860).

Almost surely, 2^520725403537 is an apocalyptic number.

It is an amenable number.

520725403537 is a deficient number, since it is larger than the sum of its proper divisors (16487903).

520725403537 is a wasteful number, since it uses less digits than its factorization.

520725403537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487902.

The product of its (nonzero) digits is 882000, while the sum is 43.

The spelling of 520725403537 in words is "five hundred twenty billion, seven hundred twenty-five million, four hundred three thousand, five hundred thirty-seven".