51555145352550 has 48 divisors (see below), whose sum is σ = 146122011973632. Its totient is φ = 11784033223200.

The previous prime is 51555145352533. The next prime is 51555145352617. The reversal of 51555145352550 is 5525354155515.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51555145352493 and 51555145352502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24550068166 + ... + 24550070265.

It is an arithmetic number, because the mean of its divisors is an integer number (3044208582784).

Almost surely, 2^{51555145352550} is an apocalyptic number.

51555145352550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51555145352550 is an abundant number, since it is smaller than the sum of its proper divisors (94566866621082).

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

51555145352550 is a wasteful number, since it uses less digits than its factorization.

51555145352550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49100138453 (or 49100138448 counting only the distinct ones).

The product of its (nonzero) digits is 9375000, while the sum is 51.

The spelling of 51555145352550 in words is "fifty-one trillion, five hundred fifty-five billion, one hundred forty-five million, three hundred fifty-two thousand, five hundred fifty".