1316552640 has 448 divisors, whose sum is σ = 4817498112. Its totient is φ = 302284800.

The previous prime is 1316552639. The next prime is 1316552647. The reversal of 1316552640 is 462556131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316552647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15862039 + ... + 15862121.

It is an arithmetic number, because the mean of its divisors is an integer number (10753344).

Almost surely, 2^1316552640 is an apocalyptic number.

1316552640 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 1316552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2408749056).

1316552640 is an abundant number, since it is smaller than the sum of its proper divisors (3500945472).

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

1316552640 is a wasteful number, since it uses less digits than its factorization.

1316552640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 178 counting only the distinct ones).

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

The square root of 1316552640 is about 36284.3305022981. The cubic root of 1316552640 is about 1096.0055232641.

The spelling of 1316552640 in words is "one billion, three hundred sixteen million, five hundred fifty-two thousand, six hundred forty".