507305081557 has 4 divisors (see below), whose sum is σ = 509520387820. Its totient is φ = 505089775296.

The previous prime is 507305081501. The next prime is 507305081561. The reversal of 507305081557 is 755180503705.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755180503705 = 5 ⋅151036100741.

It can be written as a sum of positive squares in 2 ways, for example, as 495490695921 + 11814385636 = 703911^2 + 108694^2 .

It is a cyclic number.

It is not a de Polignac number, because 507305081557 - 2¹⁹ = 507304557269 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 (507305081057) 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, 1107652788 + ... + 1107653245.

It is an arithmetic number, because the mean of its divisors is an integer number (127380096955).

Almost surely, 2^507305081557 is an apocalyptic number.

It is an amenable number.

507305081557 is a deficient number, since it is larger than the sum of its proper divisors (2215306263).

507305081557 is a wasteful number, since it uses less digits than its factorization.

507305081557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215306262.

The product of its (nonzero) digits is 735000, while the sum is 46.

The spelling of 507305081557 in words is "five hundred seven billion, three hundred five million, eighty-one thousand, five hundred fifty-seven".