770216421 has 32 divisors (see below), whose sum is σ = 1149460480. Its totient is φ = 455544000.

The previous prime is 770216393. The next prime is 770216429. The reversal of 770216421 is 124612077.

It is not a de Polignac number, because 770216421 - 2¹¹ = 770214373 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 (770216429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180450 + ... + 184668.

It is an arithmetic number, because the mean of its divisors is an integer number (35920640).

Almost surely, 2^770216421 is an apocalyptic number.

It is an amenable number.

770216421 is a deficient number, since it is larger than the sum of its proper divisors (379244059).

770216421 is a wasteful number, since it uses less digits than its factorization.

770216421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 770216421 is about 27752.7732127800. The cubic root of 770216421 is about 916.6515092737.

Adding to 770216421 its reverse (124612077), we get a palindrome (894828498).

The spelling of 770216421 in words is "seven hundred seventy million, two hundred sixteen thousand, four hundred twenty-one".