1201555035600 has 240 divisors, whose sum is σ = 3863853614208. Its totient is φ = 319179294720.

The previous prime is 1201555035587. The next prime is 1201555035823. The reversal of 1201555035600 is 65305551021.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 395637282 + ... + 395640318.

Almost surely, 2^{1201555035600} is an apocalyptic number.

1201555035600 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 1201555035600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931926807104).

1201555035600 is an abundant number, since it is smaller than the sum of its proper divisors (2662298578608).

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

1201555035600 is a wasteful number, since it uses less digits than its factorization.

1201555035600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222 (or 4211 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 1201555035600 in words is "one trillion, two hundred one billion, five hundred fifty-five million, thirty-five thousand, six hundred".