506509961988 has 48 divisors (see below), whose sum is σ = 1244127825920. Its totient is φ = 159941736864.

The previous prime is 506509961941. The next prime is 506509962031. The reversal of 506509961988 is 889169905605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5035281 + ... + 5134887.

Almost surely, 2^506509961988 is an apocalyptic number.

It is an amenable number.

506509961988 is an abundant number, since it is smaller than the sum of its proper divisors (737617863932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

506509961988 is a wasteful number, since it uses less digits than its factorization.

506509961988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121936 (or 121934 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 66.

The spelling of 506509961988 in words is "five hundred six billion, five hundred nine million, nine hundred sixty-one thousand, nine hundred eighty-eight".