57206657550 has 192 divisors, whose sum is σ = 169037180928. Its totient is φ = 12528000000.

The previous prime is 57206657531. The next prime is 57206657579. The reversal of 57206657550 is 5575660275.

It is a self number, because there is not a number n which added to its sum of digits gives 57206657550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3278850 + ... + 3296250.

It is an arithmetic number, because the mean of its divisors is an integer number (880401984).

Almost surely, 2^57206657550 is an apocalyptic number.

57206657550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 57206657550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84518590464).

57206657550 is an abundant number, since it is smaller than the sum of its proper divisors (111830523378).

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

57206657550 is a wasteful number, since it uses less digits than its factorization.

57206657550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17555 (or 17550 counting only the distinct ones).

The product of its (nonzero) digits is 2205000, while the sum is 48.

The spelling of 57206657550 in words is "fifty-seven billion, two hundred six million, six hundred fifty-seven thousand, five hundred fifty".