1488493561 has 9 divisors (see below), whose sum is σ = 1527306829. Its totient is φ = 1450645600.

The previous prime is 1488493529. The next prime is 1488493597. The reversal of 1488493561 is 1653948841.

It is a happy number.

The square root of 1488493561 is 38581.

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

It can be written as a sum of positive squares in 4 ways, for example, as 273273961 + 1215219600 = 16531^2 + 34860^2 .

It is not a de Polignac number, because 1488493561 - 2⁵ = 1488493529 is a prime.

It is a super-2 number, since 2×1488493561² = 4431226162276921442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1488493511) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1581351 + ... + 1582291.

Almost surely, 2^1488493561 is an apocalyptic number.

1488493561 is the 38581-st square number.

1488493561 is the 19291-st centered octagonal number.

It is an amenable number.

1488493561 is a deficient number, since it is larger than the sum of its proper divisors (38813268).

1488493561 is an frugal number, since it uses more digits than its factorization.

1488493561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964 (or 982 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The cubic root of 1488493561 is about 1141.7797073453.

Multiplying 1488493561 by its sum of digits (49), we get a square (72936184489 = 270067²).

The spelling of 1488493561 in words is "one billion, four hundred eighty-eight million, four hundred ninety-three thousand, five hundred sixty-one".