1356261405450 has 48 divisors (see below), whose sum is σ = 3844032329280. Its totient is φ = 310002606720.

The previous prime is 1356261405437. The next prime is 1356261405497. The reversal of 1356261405450 is 545041626531.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 645837715 + ... + 645839814.

It is an arithmetic number, because the mean of its divisors is an integer number (80084006860).

Almost surely, 2^{1356261405450} is an apocalyptic number.

1356261405450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1356261405450 is an abundant number, since it is smaller than the sum of its proper divisors (2487770923830).

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

1356261405450 is a wasteful number, since it uses less digits than its factorization.

1356261405450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291677551 (or 1291677546 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 1356261405450 in words is "one trillion, three hundred fifty-six billion, two hundred sixty-one million, four hundred five thousand, four hundred fifty".