19179197961 has 16 divisors (see below), whose sum is σ = 31882303488. Its totient is φ = 9963219600.

The previous prime is 19179197957. The next prime is 19179197977. The reversal of 19179197961 is 16979197191.

It is not a de Polignac number, because 19179197961 - 2² = 19179197957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19179197895 and 19179197904.

It is not an unprimeable number, because it can be changed into a prime (19179197981) by changing a digit.

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, 41513185 + ... + 41513646.

It is an arithmetic number, because the mean of its divisors is an integer number (1992643968).

Almost surely, 2^19179197961 is an apocalyptic number.

19179197961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19179197961 is a deficient number, since it is larger than the sum of its proper divisors (12703105527).

19179197961 is a wasteful number, since it uses less digits than its factorization.

19179197961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83026852.

The product of its digits is 1928934, while the sum is 60.

The spelling of 19179197961 in words is "nineteen billion, one hundred seventy-nine million, one hundred ninety-seven thousand, nine hundred sixty-one".