1351640220320 has 96 divisors (see below), whose sum is σ = 3512052649728. Its totient is φ = 488448672768.

The previous prime is 1351640220241. The next prime is 1351640220331. The reversal of 1351640220320 is 230220461531.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6815294 + ... + 7010813.

It is an arithmetic number, because the mean of its divisors is an integer number (36583881768).

Almost surely, 2^{1351640220320} is an apocalyptic number.

1351640220320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351640220320 is an abundant number, since it is smaller than the sum of its proper divisors (2160412429408).

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

1351640220320 is a wasteful number, since it uses less digits than its factorization.

1351640220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13826182 (or 13826174 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1351640220320 its reverse (230220461531), we get a palindrome (1581860681851).

The spelling of 1351640220320 in words is "one trillion, three hundred fifty-one billion, six hundred forty million, two hundred twenty thousand, three hundred twenty".