1428755217645 has 32 divisors (see below), whose sum is σ = 2613889605888. Its totient is φ = 652818083328.

The previous prime is 1428755217641. The next prime is 1428755217653. The reversal of 1428755217645 is 5467125578241.

It is not a de Polignac number, because 1428755217645 - 2² = 1428755217641 is a prime.

It is a super-3 number, since 3×1428755217645³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428755217641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3197224 + ... + 3616593.

It is an arithmetic number, because the mean of its divisors is an integer number (81684050184).

Almost surely, 2^{1428755217645} is an apocalyptic number.

1428755217645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428755217645 is a deficient number, since it is larger than the sum of its proper divisors (1185134388243).

1428755217645 is a wasteful number, since it uses less digits than its factorization.

1428755217645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815829.

The product of its digits is 18816000, while the sum is 57.

The spelling of 1428755217645 in words is "one trillion, four hundred twenty-eight billion, seven hundred fifty-five million, two hundred seventeen thousand, six hundred forty-five".