51451940554 has 32 divisors (see below), whose sum is σ = 89449920000. Its totient is φ = 21741014400.

The previous prime is 51451940531. The next prime is 51451940581. The reversal of 51451940554 is 45504915415.

It is a self number, because there is not a number n which added to its sum of digits gives 51451940554.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261822 + ... + 414070.

It is an arithmetic number, because the mean of its divisors is an integer number (2795310000).

Almost surely, 2^51451940554 is an apocalyptic number.

51451940554 is a deficient number, since it is larger than the sum of its proper divisors (37997979446).

51451940554 is a wasteful number, since it uses less digits than its factorization.

51451940554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152598.

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 51451940554 in words is "fifty-one billion, four hundred fifty-one million, nine hundred forty thousand, five hundred fifty-four".