1421382356550 has 72 divisors (see below), whose sum is σ = 4112532968544. Its totient is φ = 349878732480.

The previous prime is 1421382356543. The next prime is 1421382356551. The reversal of 1421382356550 is 556532831241.

It is a happy number.

1421382356550 is a `hidden beast` number, since 1 + 4 + 2 + 1 + 3 + 82 + 3 + 565 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1421382356496 and 1421382356505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421382356551) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121479822 + ... + 121491521.

It is an arithmetic number, because the mean of its divisors is an integer number (57118513452).

Almost surely, 2^{1421382356550} is an apocalyptic number.

1421382356550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421382356550 is an abundant number, since it is smaller than the sum of its proper divisors (2691150611994).

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

1421382356550 is a wasteful number, since it uses less digits than its factorization.

1421382356550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242971374 (or 242971366 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 1421382356550 in words is "one trillion, four hundred twenty-one billion, three hundred eighty-two million, three hundred fifty-six thousand, five hundred fifty".