777770241421 has 16 divisors (see below), whose sum is σ = 783843250176. Its totient is φ = 771723405936.

The previous prime is 777770241389. The next prime is 777770241433. The reversal of 777770241421 is 124142077777.

It is a cyclic number.

It is not a de Polignac number, because 777770241421 - 2⁵ = 777770241389 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 (777770241481) 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, 220517160 + ... + 220520686.

It is an arithmetic number, because the mean of its divisors is an integer number (48990203136).

Almost surely, 2^777770241421 is an apocalyptic number.

It is an amenable number.

777770241421 is a deficient number, since it is larger than the sum of its proper divisors (6073008755).

777770241421 is a wasteful number, since it uses less digits than its factorization.

777770241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its (nonzero) digits is 1075648, while the sum is 49.

The spelling of 777770241421 in words is "seven hundred seventy-seven billion, seven hundred seventy million, two hundred forty-one thousand, four hundred twenty-one".