51550003494 has 48 divisors (see below), whose sum is σ = 122049158400. Its totient is φ = 15595098480.

The previous prime is 51550003493. The next prime is 51550003529. The reversal of 51550003494 is 49430005515.

51550003494 is a `hidden beast` number, since 515 + 50 + 0 + 0 + 3 + 4 + 94 = 666.

It is a super-3 number, since 3×51550003494³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550003493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98722 + ... + 335925.

It is an arithmetic number, because the mean of its divisors is an integer number (2542690800).

Almost surely, 2^51550003494 is an apocalyptic number.

51550003494 is an abundant number, since it is smaller than the sum of its proper divisors (70499154906).

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

51550003494 is a wasteful number, since it uses less digits than its factorization.

51550003494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435265 (or 435262 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 51550003494 in words is "fifty-one billion, five hundred fifty million, three thousand, four hundred ninety-four".