1200099557376 has 432 divisors, whose sum is σ = 3616692599520. Its totient is φ = 383149670400.

The previous prime is 1200099557347. The next prime is 1200099557383. The reversal of 1200099557376 is 6737559900021.

1200099557376 is a `hidden beast` number, since 12 + 0 + 0 + 0 + 9 + 9 + 557 + 3 + 76 = 666.

It is a super-2 number, since 2×1200099557376² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2992766776 + ... + 2992767176.

It is an arithmetic number, because the mean of its divisors is an integer number (8371973610).

Almost surely, 2^{1200099557376} is an apocalyptic number.

1200099557376 is a gapful number since it is divisible by the number (16) 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 1200099557376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808346299760).

1200099557376 is an abundant number, since it is smaller than the sum of its proper divisors (2416593042144).

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

1200099557376 is an frugal number, since it uses more digits than its factorization.

1200099557376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 3572100, while the sum is 54.

The spelling of 1200099557376 in words is "one trillion, two hundred billion, ninety-nine million, five hundred fifty-seven thousand, three hundred seventy-six".