1109842391406 has 16 divisors (see below), whose sum is σ = 2536782609024. Its totient is φ = 317097826104.

The previous prime is 1109842391393. The next prime is 1109842391419. The reversal of 1109842391406 is 6041932489011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1109842391393) and next prime (1109842391419).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13212409380 + ... + 13212409463.

It is an arithmetic number, because the mean of its divisors is an integer number (158548913064).

Almost surely, 2^{1109842391406} is an apocalyptic number.

1109842391406 is an abundant number, since it is smaller than the sum of its proper divisors (1426940217618).

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

1109842391406 is a wasteful number, since it uses less digits than its factorization.

1109842391406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26424818855.

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 1109842391406 in words is "one trillion, one hundred nine billion, eight hundred forty-two million, three hundred ninety-one thousand, four hundred six".