1091977286400 has 3456 divisors, whose sum is σ = 5518446796800. Its totient is φ = 203975884800.

The previous prime is 1091977286369. The next prime is 1091977286441. The reversal of 1091977286400 is 46827791901.

1091977286400 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 97 + 72 + 86 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (3456).

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

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, 10205395147 + ... + 10205395253.

It is an arithmetic number, because the mean of its divisors is an integer number (1596772800).

Almost surely, 2^{1091977286400} is an apocalyptic number.

1091977286400 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 1091977286400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2759223398400).

1091977286400 is an abundant number, since it is smaller than the sum of its proper divisors (4426469510400).

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

1091977286400 is a wasteful number, since it uses less digits than its factorization.

1091977286400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 1091977286400 in words is "one trillion, ninety-one billion, nine hundred seventy-seven million, two hundred eighty-six thousand, four hundred".