51098886720 has 448 divisors, whose sum is σ = 206472983040. Its totient is φ = 11653963776.

The previous prime is 51098886719. The next prime is 51098886757. The reversal of 51098886720 is 2768889015.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×51098886720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46750494 + ... + 46751586.

Almost surely, 2^51098886720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51098886720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103236491520).

51098886720 is an abundant number, since it is smaller than the sum of its proper divisors (155374096320).

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

51098886720 is a wasteful number, since it uses less digits than its factorization.

51098886720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 51098886720 in words is "fifty-one billion, ninety-eight million, eight hundred eighty-six thousand, seven hundred twenty".