1691228389152 has 48 divisors (see below), whose sum is σ = 4442203557792. Its totient is φ = 563396252160.

The previous prime is 1691228389133. The next prime is 1691228389163. The reversal of 1691228389152 is 2519838221961.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 1691228389092 and 1691228389101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5257749 + ... + 5570132.

It is an arithmetic number, because the mean of its divisors is an integer number (92545907454).

Almost surely, 2^{1691228389152} is an apocalyptic number.

1691228389152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1691228389152 is an abundant number, since it is smaller than the sum of its proper divisors (2750975168640).

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

1691228389152 is a wasteful number, since it uses less digits than its factorization.

1691228389152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829521 (or 10829513 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The spelling of 1691228389152 in words is "one trillion, six hundred ninety-one billion, two hundred twenty-eight million, three hundred eighty-nine thousand, one hundred fifty-two".