1645014021450 has 48 divisors (see below), whose sum is σ = 4135520208576. Its totient is φ = 432661219200.

The previous prime is 1645014021433. The next prime is 1645014021559. The reversal of 1645014021450 is 541204105461.

It is a super-2 number, since 2×1645014021450² (a number of 25 digits) contains 22 as substring.

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, 75103846 + ... + 75125745.

It is an arithmetic number, because the mean of its divisors is an integer number (86156671012).

Almost surely, 2^{1645014021450} is an apocalyptic number.

1645014021450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1645014021450 is an abundant number, since it is smaller than the sum of its proper divisors (2490506187126).

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

1645014021450 is a wasteful number, since it uses less digits than its factorization.

1645014021450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150229679 (or 150229674 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The spelling of 1645014021450 in words is "one trillion, six hundred forty-five billion, fourteen million, twenty-one thousand, four hundred fifty".