1421155553450 has 24 divisors (see below), whose sum is σ = 2704822573728. Its totient is φ = 555242168880.

The previous prime is 1421155553417. The next prime is 1421155553459. The reversal of 1421155553450 is 543555511241.

It is a junction number, because it is equal to n+sod(n) for n = 1421155553398 and 1421155553407.

It is not an unprimeable number, because it can be changed into a prime (1421155553459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330499142 + ... + 330503441.

It is an arithmetic number, because the mean of its divisors is an integer number (112700940572).

Almost surely, 2^{1421155553450} is an apocalyptic number.

1421155553450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421155553450 is a deficient number, since it is larger than the sum of its proper divisors (1283667020278).

1421155553450 is a wasteful number, since it uses less digits than its factorization.

1421155553450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661002638 (or 661002633 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 1421155553450 in words is "one trillion, four hundred twenty-one billion, one hundred fifty-five million, five hundred fifty-three thousand, four hundred fifty".