5431457640 has 128 divisors (see below), whose sum is σ = 18662400000. Its totient is φ = 1238792448.

The previous prime is 5431457639. The next prime is 5431457671. The reversal of 5431457640 is 467541345.

It is a happy number.

It is a super-2 number, since 2×5431457640² = 59001464190228739200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395611 + ... + 409109.

It is an arithmetic number, because the mean of its divisors is an integer number (145800000).

Almost surely, 2^5431457640 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 5431457640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9331200000).

5431457640 is an abundant number, since it is smaller than the sum of its proper divisors (13230942360).

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

5431457640 is a wasteful number, since it uses less digits than its factorization.

5431457640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13999 (or 13995 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The square root of 5431457640 is about 73698.4235923673. The cubic root of 5431457640 is about 1757.8108154635.

Adding to 5431457640 its reverse (467541345), we get a palindrome (5898998985).

The spelling of 5431457640 in words is "five billion, four hundred thirty-one million, four hundred fifty-seven thousand, six hundred forty".