51490857600 has 1920 divisors, whose sum is σ = 244253116800. Its totient is φ = 10391224320.

The previous prime is 51490857599. The next prime is 51490857629. The reversal of 51490857600 is 675809415.

51490857600 is a `hidden beast` number, since 51 + 490 + 8 + 57 + 60 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 872726371 + ... + 872726429.

It is an arithmetic number, because the mean of its divisors is an integer number (127215165).

Almost surely, 2^51490857600 is an apocalyptic number.

51490857600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51490857600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122126558400).

51490857600 is an abundant number, since it is smaller than the sum of its proper divisors (192762259200).

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

51490857600 is a wasteful number, since it uses less digits than its factorization.

51490857600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 51490857600 in words is "fifty-one billion, four hundred ninety million, eight hundred fifty-seven thousand, six hundred".