1428555887146 has 4 divisors (see below), whose sum is σ = 2142833830722. Its totient is φ = 714277943572.

The previous prime is 1428555887141. The next prime is 1428555887147. The reversal of 1428555887146 is 6417885558241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 743062964121 + 685492923025 = 862011^2 + 827945^2 .

It is not an unprimeable number, because it can be changed into a prime (1428555887141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357138971785 + ... + 357138971788.

Almost surely, 2^{1428555887146} is an apocalyptic number.

1428555887146 is a deficient number, since it is larger than the sum of its proper divisors (714277943576).

1428555887146 is an equidigital number, since it uses as much as digits as its factorization.

1428555887146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714277943575.

The product of its digits is 86016000, while the sum is 64.

The spelling of 1428555887146 in words is "one trillion, four hundred twenty-eight billion, five hundred fifty-five million, eight hundred eighty-seven thousand, one hundred forty-six".