51351719850 has 72 divisors (see below), whose sum is σ = 143074800960. Its totient is φ = 13693788720.

The previous prime is 51351719827. The next prime is 51351719873. The reversal of 51351719850 is 5891715315.

51351719850 is a `hidden beast` number, since 51 + 3 + 517 + 1 + 9 + 85 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51351719827) and next prime (51351719873).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 51351719796 and 51351719805.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2101090 + ... + 2125389.

Almost surely, 2^51351719850 is an apocalyptic number.

51351719850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51351719850 is an abundant number, since it is smaller than the sum of its proper divisors (91723081110).

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

51351719850 is a wasteful number, since it uses less digits than its factorization.

51351719850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226506 (or 4226489 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 45.

The spelling of 51351719850 in words is "fifty-one billion, three hundred fifty-one million, seven hundred nineteen thousand, eight hundred fifty".