487905639481 has 16 divisors (see below), whose sum is σ = 535338541584. Its totient is φ = 441949906944.

The previous prime is 487905639409. The next prime is 487905639511. The reversal of 487905639481 is 184936509784.

It can be written as a sum of positive squares in 8 ways, for example, as 40505185081 + 447400454400 = 201259^2 + 668880^2 .

It is a de Polignac number, because none of the positive numbers 2^k-487905639481 is a prime.

It is a super-2 number, since 2×487905639481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (487905634481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117936 + ... + 1491841.

It is an arithmetic number, because the mean of its divisors is an integer number (33458658849).

Almost surely, 2^487905639481 is an apocalyptic number.

It is an amenable number.

487905639481 is a deficient number, since it is larger than the sum of its proper divisors (47432902103).

487905639481 is a wasteful number, since it uses less digits than its factorization.

487905639481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610060.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 487905639481 in words is "four hundred eighty-seven billion, nine hundred five million, six hundred thirty-nine thousand, four hundred eighty-one".