51106660947 has 12 divisors (see below), whose sum is σ = 73835338720. Its totient is φ = 34064365968.

The previous prime is 51106660939. The next prime is 51106660967. The reversal of 51106660947 is 74906660115.

51106660947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51106660947 - 2³ = 51106660939 is a prime.

It is a super-2 number, since 2×51106660947² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51106660967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513547 + ... + 604932.

Almost surely, 2^51106660947 is an apocalyptic number.

51106660947 is a deficient number, since it is larger than the sum of its proper divisors (22728677773).

51106660947 is a wasteful number, since it uses less digits than its factorization.

51106660947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123562 (or 1123559 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 51106660947 in words is "fifty-one billion, one hundred six million, six hundred sixty thousand, nine hundred forty-seven".