1528397137768 has 8 divisors (see below), whose sum is σ = 2865744633330. Its totient is φ = 764198568880.

The previous prime is 1528397137759. The next prime is 1528397137823. The reversal of 1528397137768 is 8677317938251.

It can be written as a sum of positive squares in only one way, i.e., 1223143097764 + 305254040004 = 1105958^2 + 552498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95524821103 + ... + 95524821118.

Almost surely, 2^{1528397137768} is an apocalyptic number.

It is an amenable number.

1528397137768 is a deficient number, since it is larger than the sum of its proper divisors (1337347495562).

1528397137768 is a wasteful number, since it uses less digits than its factorization.

1528397137768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191049642227 (or 191049642223 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 67.

The spelling of 1528397137768 in words is "one trillion, five hundred twenty-eight billion, three hundred ninety-seven million, one hundred thirty-seven thousand, seven hundred sixty-eight".