11973734640 has 360 divisors, whose sum is σ = 48509761248. Its totient is φ = 2592414720.

The previous prime is 11973734639. The next prime is 11973734671. The reversal of 11973734640 is 4643737911.

11973734640 is a `hidden beast` number, since 119 + 7 + 3 + 73 + 464 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1816150 + ... + 1822730.

Almost surely, 2^11973734640 is an apocalyptic number.

11973734640 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 11973734640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24254880624).

11973734640 is an abundant number, since it is smaller than the sum of its proper divisors (36536026608).

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

11973734640 is a wasteful number, since it uses less digits than its factorization.

11973734640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6645 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 11973734640 in words is "eleven billion, nine hundred seventy-three million, seven hundred thirty-four thousand, six hundred forty".