513525615407 has 4 divisors (see below), whose sum is σ = 586886417616. Its totient is φ = 440164813200.

The previous prime is 513525615367. The next prime is 513525615457. The reversal of 513525615407 is 704516525315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 513525615407 - 2¹⁶ = 513525549871 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 (513525615457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36680401094 + ... + 36680401107.

It is an arithmetic number, because the mean of its divisors is an integer number (146721604404).

Almost surely, 2^513525615407 is an apocalyptic number.

513525615407 is a deficient number, since it is larger than the sum of its proper divisors (73360802209).

513525615407 is an equidigital number, since it uses as much as digits as its factorization.

513525615407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73360802208.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 513525615407 in words is "five hundred thirteen billion, five hundred twenty-five million, six hundred fifteen thousand, four hundred seven".