6428431613787 has 16 divisors (see below), whose sum is σ = 8596876185600. Its totient is φ = 4272806741472.

The previous prime is 6428431613783. The next prime is 6428431613797. The reversal of 6428431613787 is 7873161348246.

It is not a de Polignac number, because 6428431613787 - 2² = 6428431613783 is a prime.

It is a super-2 number, since 2×6428431613787² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6428431613787.

It is not an unprimeable number, because it can be changed into a prime (6428431613783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9395589 + ... + 10056537.

It is an arithmetic number, because the mean of its divisors is an integer number (537304761600).

Almost surely, 2^{6428431613787} is an apocalyptic number.

6428431613787 is a deficient number, since it is larger than the sum of its proper divisors (2168444571813).

6428431613787 is a wasteful number, since it uses less digits than its factorization.

6428431613787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670642.

The product of its digits is 32514048, while the sum is 60.

The spelling of 6428431613787 in words is "six trillion, four hundred twenty-eight billion, four hundred thirty-one million, six hundred thirteen thousand, seven hundred eighty-seven".