1285277048550 has 768 divisors, whose sum is σ = 4214623104000. Its totient is φ = 284663808000.

The previous prime is 1285277048527. The next prime is 1285277048651. The reversal of 1285277048550 is 558407725821.

It is a happy number.

1285277048550 is a `hidden beast` number, since 1 + 2 + 8 + 527 + 70 + 48 + 5 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 912190246 + ... + 912191654.

It is an arithmetic number, because the mean of its divisors is an integer number (5487790500).

Almost surely, 2^{1285277048550} is an apocalyptic number.

1285277048550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285277048550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2107311552000).

1285277048550 is an abundant number, since it is smaller than the sum of its proper divisors (2929346055450).

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

1285277048550 is a wasteful number, since it uses less digits than its factorization.

1285277048550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 54.

The spelling of 1285277048550 in words is "one trillion, two hundred eighty-five billion, two hundred seventy-seven million, forty-eight thousand, five hundred fifty".