19156144690 has 16 divisors (see below), whose sum is σ = 34489737792. Its totient is φ = 7660529584.

The previous prime is 19156144591. The next prime is 19156144703. The reversal of 19156144690 is 9644165191.

It is a super-2 number, since 2×19156144690² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19156144690.

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, 198964 + ... + 279103.

It is an arithmetic number, because the mean of its divisors is an integer number (2155608612).

Almost surely, 2^19156144690 is an apocalyptic number.

19156144690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19156144690 is a deficient number, since it is larger than the sum of its proper divisors (15333593102).

19156144690 is a wasteful number, since it uses less digits than its factorization.

19156144690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482081.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 19156144690 in words is "nineteen billion, one hundred fifty-six million, one hundred forty-four thousand, six hundred ninety".