1691228389100 has 18 divisors (see below), whose sum is σ = 3669965604564. Its totient is φ = 676491355600.

The previous prime is 1691228389073. The next prime is 1691228389133. The reversal of 1691228389100 is 19838221961.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8456141846 + ... + 8456142045.

Almost surely, 2^{1691228389100} is an apocalyptic number.

1691228389100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1691228389100 is an abundant number, since it is smaller than the sum of its proper divisors (1978737215464).

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

1691228389100 is a wasteful number, since it uses less digits than its factorization.

1691228389100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16912283905 (or 16912283898 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 1691228389100 in words is "one trillion, six hundred ninety-one billion, two hundred twenty-eight million, three hundred eighty-nine thousand, one hundred".