1391155696 has 80 divisors (see below), whose sum is σ = 3301288704. Its totient is φ = 554314752.

The previous prime is 1391155687. The next prime is 1391155709. The reversal of 1391155696 is 6965511931.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 153631 + ... + 162433.

Almost surely, 2^1391155696 is an apocalyptic number.

1391155696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391155696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1650644352).

1391155696 is an abundant number, since it is smaller than the sum of its proper divisors (1910133008).

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

1391155696 is a wasteful number, since it uses less digits than its factorization.

1391155696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8918 (or 8912 counting only the distinct ones).

The product of its digits is 218700, while the sum is 46.

The square root of 1391155696 is about 37298.1996348349. The cubic root of 1391155696 is about 1116.3282436949.

The spelling of 1391155696 in words is "one billion, three hundred ninety-one million, one hundred fifty-five thousand, six hundred ninety-six".