1356781562020 has 48 divisors (see below), whose sum is σ = 2920185597168. Its totient is φ = 529212579840.

The previous prime is 1356781562011. The next prime is 1356781562021. The reversal of 1356781562020 is 202651876531.

It can be written as a sum of positive squares in 8 ways, for example, as 5347411876 + 1351434150144 = 73126^2 + 1162512^2 .

It is a super-2 number, since 2×1356781562020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1356781562021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1243774 + ... + 2064106.

It is an arithmetic number, because the mean of its divisors is an integer number (60837199941).

Almost surely, 2^{1356781562020} is an apocalyptic number.

1356781562020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356781562020 is an abundant number, since it is smaller than the sum of its proper divisors (1563404035148).

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

1356781562020 is a wasteful number, since it uses less digits than its factorization.

1356781562020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822400 (or 822398 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 1356781562020 in words is "one trillion, three hundred fifty-six billion, seven hundred eighty-one million, five hundred sixty-two thousand, twenty".