6433978879461 has 32 divisors (see below), whose sum is σ = 9816022056960. Its totient is φ = 3672112938624.

The previous prime is 6433978879423. The next prime is 6433978879463. The reversal of 6433978879461 is 1649788793346.

It is not a de Polignac number, because 6433978879461 - 2¹³ = 6433978871269 is a prime.

It is a super-4 number, since 4×6433978879461⁴ (a number of 52 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6433978879463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64223536 + ... + 64323638.

It is an arithmetic number, because the mean of its divisors is an integer number (306750689280).

Almost surely, 2^{6433978879461} is an apocalyptic number.

It is an amenable number.

6433978879461 is a deficient number, since it is larger than the sum of its proper divisors (3382043177499).

6433978879461 is a wasteful number, since it uses less digits than its factorization.

6433978879461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103785.

The product of its digits is 1316818944, while the sum is 75.

The spelling of 6433978879461 in words is "six trillion, four hundred thirty-three billion, nine hundred seventy-eight million, eight hundred seventy-nine thousand, four hundred sixty-one".