428951251277 has 4 divisors (see below), whose sum is σ = 429352516380. Its totient is φ = 428549986176.

The previous prime is 428951251271. The next prime is 428951251283. The reversal of 428951251277 is 772152159824.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (428951251271) and next prime (428951251283).

It can be written as a sum of positive squares in 2 ways, for example, as 82329398761 + 346621852516 = 286931^2 + 588746^2 .

It is a cyclic number.

It is not a de Polignac number, because 428951251277 - 2¹⁸ = 428950989133 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 (428951251271) 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, 200630948 + ... + 200633085.

It is an arithmetic number, because the mean of its divisors is an integer number (107338129095).

Almost surely, 2^428951251277 is an apocalyptic number.

It is an amenable number.

428951251277 is a deficient number, since it is larger than the sum of its proper divisors (401265103).

428951251277 is a wasteful number, since it uses less digits than its factorization.

428951251277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401265102.

The product of its digits is 2822400, while the sum is 53.

The spelling of 428951251277 in words is "four hundred twenty-eight billion, nine hundred fifty-one million, two hundred fifty-one thousand, two hundred seventy-seven".