509156887061 has 4 divisors (see below), whose sum is σ = 509158443552. Its totient is φ = 509155330572.

The previous prime is 509156887049. The next prime is 509156887067. The reversal of 509156887061 is 160788651905.

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 509156887061 - 2²² = 509152692757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 509156886988 and 509156887006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509156887067) 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, 76865 + ... + 1012038.

It is an arithmetic number, because the mean of its divisors is an integer number (127289610888).

Almost surely, 2^509156887061 is an apocalyptic number.

It is an amenable number.

509156887061 is a deficient number, since it is larger than the sum of its proper divisors (1556491).

509156887061 is a wasteful number, since it uses less digits than its factorization.

509156887061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556490.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 509156887061 in words is "five hundred nine billion, one hundred fifty-six million, eight hundred eighty-seven thousand, sixty-one".