51434555550 has 192 divisors, whose sum is σ = 147807206400. Its totient is φ = 11593912320.

The previous prime is 51434555537. The next prime is 51434555591. The reversal of 51434555550 is 5555543415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 35544927 + ... + 35546373.

It is an arithmetic number, because the mean of its divisors is an integer number (769829200).

Almost surely, 2^51434555550 is an apocalyptic number.

51434555550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51434555550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73903603200).

51434555550 is an abundant number, since it is smaller than the sum of its proper divisors (96372650850).

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

51434555550 is a wasteful number, since it uses less digits than its factorization.

51434555550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 42.

The spelling of 51434555550 in words is "fifty-one billion, four hundred thirty-four million, five hundred fifty-five thousand, five hundred fifty".