6399029142 has 24 divisors (see below), whose sum is σ = 15124978440. Its totient is φ = 1939099680.

The previous prime is 6399029113. The next prime is 6399029167. The reversal of 6399029142 is 2419209936.

It is a happy number.

6399029142 is a `hidden beast` number, since 639 + 9 + 0 + 2 + 9 + 1 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16158967 + ... + 16159362.

It is an arithmetic number, because the mean of its divisors is an integer number (630207435).

Almost surely, 2^6399029142 is an apocalyptic number.

6399029142 is an abundant number, since it is smaller than the sum of its proper divisors (8725949298).

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

6399029142 is a wasteful number, since it uses less digits than its factorization.

6399029142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32318348 (or 32318345 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 6399029142 is about 79993.9319073641. The cubic root of 6399029142 is about 1856.5416469548.

The spelling of 6399029142 in words is "six billion, three hundred ninety-nine million, twenty-nine thousand, one hundred forty-two".