457732451821 has 8 divisors (see below), whose sum is σ = 473619472920. Its totient is φ = 441852307008.

The previous prime is 457732451801. The next prime is 457732451833. The reversal of 457732451821 is 128154237754.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1856317225 + 455876134596 = 43085^2 + 675186^2 .

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 457732451821 - 2¹⁹ = 457731927533 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 (457732451801) 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, 1583446 + ... + 1850071.

It is an arithmetic number, because the mean of its divisors is an integer number (59202434115).

Almost surely, 2^457732451821 is an apocalyptic number.

It is an amenable number.

457732451821 is a deficient number, since it is larger than the sum of its proper divisors (15887021099).

457732451821 is a wasteful number, since it uses less digits than its factorization.

457732451821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438143.

The product of its digits is 1881600, while the sum is 49.

The spelling of 457732451821 in words is "four hundred fifty-seven billion, seven hundred thirty-two million, four hundred fifty-one thousand, eight hundred twenty-one".