63862849521 has 45 divisors (see below), whose sum is σ = 97820061339. Its totient is φ = 41521428144.

The previous prime is 63862849511. The next prime is 63862849537. The reversal of 63862849521 is 12594826836.

The square root of 63862849521 is 252711.

It is a perfect power (a square), and thus also a powerful number.

63862849521 is a `hidden beast` number, since 6 + 3 + 8 + 628 + 4 + 9 + 5 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14860829025 + 49002020496 = 121905^2 + 221364^2 .

It is not a de Polignac number, because 63862849521 - 2¹¹ = 63862847473 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (63862849511) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 97798831 + ... + 97799483.

Almost surely, 2^63862849521 is an apocalyptic number.

63862849521 is the 252711-st square number.

63862849521 is the 126356-th centered octagonal number.

It is an amenable number.

63862849521 is a deficient number, since it is larger than the sum of its proper divisors (33957211818).

63862849521 is an frugal number, since it uses more digits than its factorization.

63862849521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 699 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 63862849521 in words is "sixty-three billion, eight hundred sixty-two million, eight hundred forty-nine thousand, five hundred twenty-one".