428542076515181 has 8 divisors (see below), whose sum is σ = 429563740939800. Its totient is φ = 427521116934720.

The previous prime is 428542076515171. The next prime is 428542076515229. The reversal of 428542076515181 is 181515670245824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1165385020900 + 427376691494281 = 1079530^2 + 20673091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428542076515181 - 2³⁸ = 428267198608237 is a prime.

It is a super-2 number, since 2×428542076515181² (a number of 30 digits) contains 22 as substring.

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 428542076515181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428542076515151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174993590 + ... + 177425591.

It is an arithmetic number, because the mean of its divisors is an integer number (53695467617475).

Almost surely, 2^{428542076515181} is an apocalyptic number.

It is an amenable number.

428542076515181 is a deficient number, since it is larger than the sum of its proper divisors (1021664424619).

428542076515181 is a wasteful number, since it uses less digits than its factorization.

428542076515181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352422079.

The product of its (nonzero) digits is 21504000, while the sum is 59.

The spelling of 428542076515181 in words is "four hundred twenty-eight trillion, five hundred forty-two billion, seventy-six million, five hundred fifteen thousand, one hundred eighty-one".