428375365641 has 14 divisors (see below), whose sum is σ = 642269239290. Its totient is φ = 285583576608.

The previous prime is 428375365619. The next prime is 428375365643. The reversal of 428375365641 is 146563573824.

428375365641 is a `hidden beast` number, since 4 + 2 + 8 + 3 + 75 + 3 + 6 + 564 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 221346725625 + 207028640016 = 470475^2 + 455004^2 .

It is not a de Polignac number, because 428375365641 - 2¹⁴ = 428375349257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428375365643) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 293809536 + ... + 293810993.

It is an arithmetic number, because the mean of its divisors is an integer number (45876374235).

Almost surely, 2^428375365641 is an apocalyptic number.

It is an amenable number.

428375365641 is a deficient number, since it is larger than the sum of its proper divisors (213893873649).

428375365641 is an frugal number, since it uses more digits than its factorization.

428375365641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587620547 (or 587620532 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 428375365641 in words is "four hundred twenty-eight billion, three hundred seventy-five million, three hundred sixty-five thousand, six hundred forty-one".