5991657440 has 24 divisors (see below), whose sum is σ = 14155291080. Its totient is φ = 2396662912.

The previous prime is 5991657403. The next prime is 5991657479. The reversal of 5991657440 is 447561995.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18723770 + ... + 18724089.

It is an arithmetic number, because the mean of its divisors is an integer number (589803795).

Almost surely, 2^5991657440 is an apocalyptic number.

It is an amenable number.

5991657440 is an abundant number, since it is smaller than the sum of its proper divisors (8163633640).

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

5991657440 is a wasteful number, since it uses less digits than its factorization.

5991657440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37447874 (or 37447866 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 5991657440 is about 77405.7971989179. The cubic root of 5991657440 is about 1816.2780112191.

The spelling of 5991657440 in words is "five billion, nine hundred ninety-one million, six hundred fifty-seven thousand, four hundred forty".