1631260660 has 24 divisors (see below), whose sum is σ = 3428104680. Its totient is φ = 652036224.

The previous prime is 1631260613. The next prime is 1631260679. The reversal of 1631260660 is 660621361.

It can be written as a sum of positive squares in 4 ways, for example, as 9909904 + 1621350756 = 3148^2 + 40266^2 .

It is a super-2 number, since 2×1631260660² = 5322022681727271200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42 + ... + 57118.

It is an arithmetic number, because the mean of its divisors is an integer number (142837695).

Almost surely, 2^1631260660 is an apocalyptic number.

1631260660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1631260660 is an abundant number, since it is smaller than the sum of its proper divisors (1796844020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631260660 is a wasteful number, since it uses less digits than its factorization.

1631260660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58515 (or 58513 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1631260660 is about 40388.8680207802. The cubic root of 1631260660 is about 1177.1752456285.

The spelling of 1631260660 in words is "one billion, six hundred thirty-one million, two hundred sixty thousand, six hundred sixty".