51263881470 has 192 divisors, whose sum is σ = 141224878080. Its totient is φ = 12884707584.

The previous prime is 51263881457. The next prime is 51263881477. The reversal of 51263881470 is 7418836215.

51263881470 is a `hidden beast` number, since 5 + 1 + 2 + 638 + 8 + 1 + 4 + 7 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51263881477) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18183721 + ... + 18186539.

It is an arithmetic number, because the mean of its divisors is an integer number (735546240).

Almost surely, 2^51263881470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51263881470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70612439040).

51263881470 is an abundant number, since it is smaller than the sum of its proper divisors (89960996610).

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

51263881470 is a wasteful number, since it uses less digits than its factorization.

51263881470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3036 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 51263881470 in words is "fifty-one billion, two hundred sixty-three million, eight hundred eighty-one thousand, four hundred seventy".