77214262821 has 16 divisors (see below), whose sum is σ = 105400008000. Its totient is φ = 50264058368.

The previous prime is 77214262819. The next prime is 77214262831. The reversal of 77214262821 is 12826241277.

It is a cyclic number.

It is not a de Polignac number, because 77214262821 - 2¹ = 77214262819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77214262831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1437516 + ... + 1490261.

It is an arithmetic number, because the mean of its divisors is an integer number (6587500500).

Almost surely, 2^77214262821 is an apocalyptic number.

It is an amenable number.

77214262821 is a deficient number, since it is larger than the sum of its proper divisors (28185745179).

77214262821 is a wasteful number, since it uses less digits than its factorization.

77214262821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927988.

The product of its digits is 150528, while the sum is 42.

The spelling of 77214262821 in words is "seventy-seven billion, two hundred fourteen million, two hundred sixty-two thousand, eight hundred twenty-one".