15691381034 has 72 divisors (see below), whose sum is σ = 29291834880. Its totient is φ = 6282006192.

The previous prime is 15691381033. The next prime is 15691381067. The reversal of 15691381034 is 43018319651.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15691380982 and 15691381000.

It is not an unprimeable number, because it can be changed into a prime (15691381031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2225687 + ... + 2232725.

It is an arithmetic number, because the mean of its divisors is an integer number (406831040).

Almost surely, 2^15691381034 is an apocalyptic number.

15691381034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15691381034 is a deficient number, since it is larger than the sum of its proper divisors (13600453846).

15691381034 is a wasteful number, since it uses less digits than its factorization.

15691381034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7144 (or 7114 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 15691381034 in words is "fifteen billion, six hundred ninety-one million, three hundred eighty-one thousand, thirty-four".