77553771114221 has 4 divisors (see below), whose sum is σ = 77577279384000. Its totient is φ = 77530262844444.

The previous prime is 77553771114199. The next prime is 77553771114331. The reversal of 77553771114221 is 12241117735577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77553771114221 - 2²⁶ = 77553704005357 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 (77553771134221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11754129941 + ... + 11754136538.

It is an arithmetic number, because the mean of its divisors is an integer number (19394319846000).

Almost surely, 2^{77553771114221} is an apocalyptic number.

It is an amenable number.

77553771114221 is a deficient number, since it is larger than the sum of its proper divisors (23508269779).

77553771114221 is a wasteful number, since it uses less digits than its factorization.

77553771114221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23508269778.

The product of its digits is 2881200, while the sum is 53.

Adding to 77553771114221 its reverse (12241117735577), we get a palindrome (89794888849798).

The spelling of 77553771114221 in words is "seventy-seven trillion, five hundred fifty-three billion, seven hundred seventy-one million, one hundred fourteen thousand, two hundred twenty-one".