77411621 has 12 divisors (see below), whose sum is σ = 90195660. Its totient is φ = 66245760.

The previous prime is 77411573. The next prime is 77411627. The reversal of 77411621 is 12611477.

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 44222500 = 5761^2 + 6650^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77411621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77411627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51245 + ... + 52733.

It is an arithmetic number, because the mean of its divisors is an integer number (7516305).

Almost surely, 2^77411621 is an apocalyptic number.

It is an amenable number.

77411621 is a deficient number, since it is larger than the sum of its proper divisors (12784039).

77411621 is a wasteful number, since it uses less digits than its factorization.

77411621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2557 counting only the distinct ones).

The product of its digits is 2352, while the sum is 29.

The square root of 77411621 is about 8798.3874090654. The cubic root of 77411621 is about 426.1888209796.

The spelling of 77411621 in words is "seventy-seven million, four hundred eleven thousand, six hundred twenty-one".