1316620002640 has 40 divisors (see below), whose sum is σ = 3062474602920. Its totient is φ = 526418651136.

The previous prime is 1316620002587. The next prime is 1316620002673. The reversal of 1316620002640 is 462000266131.

It can be written as a sum of positive squares in 4 ways, for example, as 28987456 + 1316591015184 = 5384^2 + 1147428^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3398685 + ... + 3766204.

It is an arithmetic number, because the mean of its divisors is an integer number (76561865073).

Almost surely, 2^{1316620002640} is an apocalyptic number.

1316620002640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316620002640 is an abundant number, since it is smaller than the sum of its proper divisors (1745854600280).

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

1316620002640 is a wasteful number, since it uses less digits than its factorization.

1316620002640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167199 (or 7167193 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 1316620002640 its reverse (462000266131), we get a palindrome (1778620268771).

The spelling of 1316620002640 in words is "one trillion, three hundred sixteen billion, six hundred twenty million, two thousand, six hundred forty".