51555590002 has 12 divisors (see below), whose sum is σ = 89959243950. Its totient is φ = 22095252816.

The previous prime is 51555589999. The next prime is 51555590017. The reversal of 51555590002 is 20009555515.

It can be written as a sum of positive squares in only one way, i.e., 49978626481 + 1576963521 = 223559^2 + 39711^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263038627 + ... + 263038822.

Almost surely, 2^51555590002 is an apocalyptic number.

51555590002 is a deficient number, since it is larger than the sum of its proper divisors (38403653948).

51555590002 is a wasteful number, since it uses less digits than its factorization.

51555590002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526077465 (or 526077458 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 37.

The spelling of 51555590002 in words is "fifty-one billion, five hundred fifty-five million, five hundred ninety thousand, two".