1201775393280 has 1280 divisors, whose sum is σ = 4948099301376. Its totient is φ = 241594859520.

The previous prime is 1201775393267. The next prime is 1201775393303. The reversal of 1201775393280 is 823935771021.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4246556019 + ... + 4246556301.

Almost surely, 2^{1201775393280} is an apocalyptic number.

1201775393280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201775393280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2474049650688).

1201775393280 is an abundant number, since it is smaller than the sum of its proper divisors (3746323908096).

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

1201775393280 is a wasteful number, since it uses less digits than its factorization.

1201775393280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 1201775393280 in words is "one trillion, two hundred one billion, seven hundred seventy-five million, three hundred ninety-three thousand, two hundred eighty".