1199989739520 has 1248 divisors, whose sum is σ = 4984631084160. Its totient is φ = 263155875840.

The previous prime is 1199989739519. The next prime is 1199989739561. The reversal of 1199989739520 is 259379899911.

1199989739520 is a `hidden beast` number, since 1 + 1 + 9 + 9 + 9 + 8 + 97 + 3 + 9 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (1248).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 1396960851 + ... + 1396961709.

It is an arithmetic number, because the mean of its divisors is an integer number (3994095420).

Almost surely, 2^{1199989739520} is an apocalyptic number.

1199989739520 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 1199989739520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2492315542080).

1199989739520 is an abundant number, since it is smaller than the sum of its proper divisors (3784641344640).

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

1199989739520 is a wasteful number, since it uses less digits than its factorization.

1199989739520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 99202320, while the sum is 72.

The spelling of 1199989739520 in words is "one trillion, one hundred ninety-nine billion, nine hundred eighty-nine million, seven hundred thirty-nine thousand, five hundred twenty".