561651436052550 has 36 divisors (see below), whose sum is σ = 1508970191529060. Its totient is φ = 149773716280560.

The previous prime is 561651436052479. The next prime is 561651436052561. The reversal of 561651436052550 is 55250634156165.

561651436052550 is a `hidden beast` number, since 5 + 6 + 1 + 6 + 5 + 1 + 4 + 3 + 60 + 525 + 50 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 624057150720 + ... + 624057151619.

It is an arithmetic number, because the mean of its divisors is an integer number (41915838653585).

Almost surely, 2^{561651436052550} is an apocalyptic number.

561651436052550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561651436052550 is an abundant number, since it is smaller than the sum of its proper divisors (947318755476510).

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

561651436052550 is a wasteful number, since it uses less digits than its factorization.

561651436052550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248114302357 (or 1248114302349 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 54.

The spelling of 561651436052550 in words is "five hundred sixty-one trillion, six hundred fifty-one billion, four hundred thirty-six million, fifty-two thousand, five hundred fifty".