51556950009 has 8 divisors (see below), whose sum is σ = 76380666720. Its totient is φ = 34371299988.

The previous prime is 51556950007. The next prime is 51556950013. The reversal of 51556950009 is 90005965515.

51556950009 is a `hidden beast` number, since 5 + 1 + 556 + 95 + 0 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 51556950009 - 2¹ = 51556950007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51556950007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954758307 + ... + 954758360.

It is an arithmetic number, because the mean of its divisors is an integer number (9547583340).

Almost surely, 2^51556950009 is an apocalyptic number.

It is an amenable number.

51556950009 is a deficient number, since it is larger than the sum of its proper divisors (24823716711).

51556950009 is a wasteful number, since it uses less digits than its factorization.

51556950009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909516676 (or 1909516670 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 45.

The spelling of 51556950009 in words is "fifty-one billion, five hundred fifty-six million, nine hundred fifty thousand, nine".