6420129360 has 40 divisors (see below), whose sum is σ = 19902401760. Its totient is φ = 1712034432.

The previous prime is 6420129349. The next prime is 6420129377. The reversal of 6420129360 is 639210246.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13375030 + ... + 13375509.

It is an arithmetic number, because the mean of its divisors is an integer number (497560044).

Almost surely, 2^6420129360 is an apocalyptic number.

6420129360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6420129360 is an abundant number, since it is smaller than the sum of its proper divisors (13482272400).

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

6420129360 is a wasteful number, since it uses less digits than its factorization.

6420129360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26750555 (or 26750549 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6420129360 is about 80125.7097316461. The cubic root of 6420129360 is about 1858.5800007094.

The spelling of 6420129360 in words is "six billion, four hundred twenty million, one hundred twenty-nine thousand, three hundred sixty".