51119855787 has 72 divisors (see below), whose sum is σ = 93855569808. Its totient is φ = 24512906880.

The previous prime is 51119855783. The next prime is 51119855863. The reversal of 51119855787 is 78755891115.

It is not a de Polignac number, because 51119855787 - 2² = 51119855783 is a prime.

It is a super-2 number, since 2×51119855787² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51119855783) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 120693 + ... + 341769.

Almost surely, 2^51119855787 is an apocalyptic number.

51119855787 is a deficient number, since it is larger than the sum of its proper divisors (42735714021).

51119855787 is a wasteful number, since it uses less digits than its factorization.

51119855787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221129 (or 221111 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 57.

The spelling of 51119855787 in words is "fifty-one billion, one hundred nineteen million, eight hundred fifty-five thousand, seven hundred eighty-seven".