6415440142 has 16 divisors (see below), whose sum is σ = 9984028032. Its totient is φ = 3088481760.

The previous prime is 6415440139. The next prime is 6415440197. The reversal of 6415440142 is 2410445146.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 250413 + ... + 274840.

It is an arithmetic number, because the mean of its divisors is an integer number (624001752).

Almost surely, 2^6415440142 is an apocalyptic number.

6415440142 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6415440142 is a deficient number, since it is larger than the sum of its proper divisors (3568587890).

6415440142 is a wasteful number, since it uses less digits than its factorization.

6415440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525483.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 6415440142 is about 80096.4427549688. The cubic root of 6415440142 is about 1858.1273925127.

Adding to 6415440142 its reverse (2410445146), we get a palindrome (8825885288).

The spelling of 6415440142 in words is "six billion, four hundred fifteen million, four hundred forty thousand, one hundred forty-two".