481639257 has 32 divisors (see below), whose sum is σ = 824204160. Its totient is φ = 274728960.

The previous prime is 481639247. The next prime is 481639267. The reversal of 481639257 is 752936184.

481639257 is a `hidden beast` number, since 4 + 8 + 1 + 639 + 2 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (481639247) and next prime (481639267).

It is not a de Polignac number, because 481639257 - 2⁷ = 481639129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (481639217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42648 + ... + 52745.

It is an arithmetic number, because the mean of its divisors is an integer number (25756380).

Almost surely, 2^481639257 is an apocalyptic number.

It is an amenable number.

481639257 is a deficient number, since it is larger than the sum of its proper divisors (342564903).

481639257 is a wasteful number, since it uses less digits than its factorization.

481639257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95430 (or 95424 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 481639257 is about 21946.2811656098. The cubic root of 481639257 is about 783.8638313637.

The spelling of 481639257 in words is "four hundred eighty-one million, six hundred thirty-nine thousand, two hundred fifty-seven".