770042308521 has 4 divisors (see below), whose sum is σ = 1026723078032. Its totient is φ = 513361539012.

The previous prime is 770042308501. The next prime is 770042308577. The reversal of 770042308521 is 125803240077.

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 not a de Polignac number, because 770042308521 - 2⁶ = 770042308457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 770042308521.

It is not an unprimeable number, because it can be changed into a prime (770042308501) 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 3 ways as a sum of consecutive naturals, for example, 128340384751 + ... + 128340384756.

It is an arithmetic number, because the mean of its divisors is an integer number (256680769508).

Almost surely, 2^770042308521 is an apocalyptic number.

It is an amenable number.

770042308521 is a deficient number, since it is larger than the sum of its proper divisors (256680769511).

770042308521 is a wasteful number, since it uses less digits than its factorization.

770042308521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256680769510.

The product of its (nonzero) digits is 94080, while the sum is 39.

Adding to 770042308521 its reverse (125803240077), we get a palindrome (895845548598).

The spelling of 770042308521 in words is "seven hundred seventy billion, forty-two million, three hundred eight thousand, five hundred twenty-one".