51654040025220 has 144 divisors (see below), whose sum is σ = 165909373117488. Its totient is φ = 12963467427840.

The previous prime is 51654040025099. The next prime is 51654040025281. The reversal of 51654040025220 is 2252004045615.

51654040025220 is a `hidden beast` number, since 5 + 1 + 6 + 5 + 4 + 0 + 400 + 25 + 220 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4694597556804 + 46959442468416 = 2166702^2 + 6852696^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58870372 + ... + 59741348.

It is an arithmetic number, because the mean of its divisors is an integer number (1152148424427).

Almost surely, 2^{51654040025220} is an apocalyptic number.

It is an amenable number.

51654040025220 is an abundant number, since it is smaller than the sum of its proper divisors (114255333092268).

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

51654040025220 is a wasteful number, since it uses less digits than its factorization.

51654040025220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890390 (or 890385 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 51654040025220 in words is "fifty-one trillion, six hundred fifty-four billion, forty million, twenty-five thousand, two hundred twenty".