5999111640 has 256 divisors, whose sum is σ = 21295612800. Its totient is φ = 1496973312.

The previous prime is 5999111639. The next prime is 5999111659. The reversal of 5999111640 is 461119995.

5999111640 is a `hidden beast` number, since 599 + 9 + 1 + 1 + 16 + 40 = 666.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3542634 + ... + 3544326.

Almost surely, 2^5999111640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5999111640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10647806400).

5999111640 is an abundant number, since it is smaller than the sum of its proper divisors (15296501160).

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

5999111640 is a wasteful number, since it uses less digits than its factorization.

5999111640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 5999111640 is about 77453.9323727337. The cubic root of 5999111640 is about 1817.0309074474.

It can be divided in two parts, 59991 and 11640, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 5999111640 in words is "five billion, nine hundred ninety-nine million, one hundred eleven thousand, six hundred forty".