77875082421 has 16 divisors (see below), whose sum is σ = 105393959424. Its totient is φ = 51136622064.

The previous prime is 77875082419. The next prime is 77875082429. The reversal of 77875082421 is 12428057877.

It is not a de Polignac number, because 77875082421 - 2¹ = 77875082419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77875082429) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3563490 + ... + 3585276.

It is an arithmetic number, because the mean of its divisors is an integer number (6587122464).

Almost surely, 2^77875082421 is an apocalyptic number.

It is an amenable number.

77875082421 is a deficient number, since it is larger than the sum of its proper divisors (27518877003).

77875082421 is a wasteful number, since it uses less digits than its factorization.

77875082421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39640.

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 77875082421 in words is "seventy-seven billion, eight hundred seventy-five million, eighty-two thousand, four hundred twenty-one".