51454520442400 has 36 divisors (see below), whose sum is σ = 125613348031962. Its totient is φ = 20581808176640.

The previous prime is 51454520442373. The next prime is 51454520442431. The reversal of 51454520442400 is 424402545415.

It can be written as a sum of positive squares in 3 ways, for example, as 23387708455056 + 28066811987344 = 4836084^2 + 5297812^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32159074477 + ... + 32159076076.

Almost surely, 2^{51454520442400} is an apocalyptic number.

51454520442400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51454520442400 is an abundant number, since it is smaller than the sum of its proper divisors (74158827589562).

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

51454520442400 is a wasteful number, since it uses less digits than its factorization.

51454520442400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64318150573 (or 64318150560 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 40.

Adding to 51454520442400 its reverse (424402545415), we get a palindrome (51878922987815).

The spelling of 51454520442400 in words is "fifty-one trillion, four hundred fifty-four billion, five hundred twenty million, four hundred forty-two thousand, four hundred".