1631562540 has 96 divisors (see below), whose sum is σ = 4658653440. Its totient is φ = 426567936.

The previous prime is 1631562521. The next prime is 1631562551. The reversal of 1631562540 is 452651361.

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 31 ways as a sum of consecutive naturals, for example, 691042 + ... + 693398.

It is an arithmetic number, because the mean of its divisors is an integer number (48527640).

Almost surely, 2^1631562540 is an apocalyptic number.

1631562540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631562540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329326720).

1631562540 is an abundant number, since it is smaller than the sum of its proper divisors (3027090900).

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

1631562540 is a wasteful number, since it uses less digits than its factorization.

1631562540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 2589 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 1631562540 is about 40392.6050162650. The cubic root of 1631562540 is about 1177.2478569025.

The spelling of 1631562540 in words is "one billion, six hundred thirty-one million, five hundred sixty-two thousand, five hundred forty".