9419891679 has 160 divisors (see below), whose sum is σ = 16685222400. Its totient is φ = 5240712960.

The previous prime is 9419891623. The next prime is 9419891681. The reversal of 9419891679 is 9761989149.

It is a de Polignac number, because none of the positive numbers 2^k-9419891679 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9419891609) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 56406454 + ... + 56406620.

It is an arithmetic number, because the mean of its divisors is an integer number (104282640).

Almost surely, 2^9419891679 is an apocalyptic number.

9419891679 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9419891679 is a deficient number, since it is larger than the sum of its proper divisors (7265330721).

9419891679 is a wasteful number, since it uses less digits than its factorization.

9419891679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 306 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 9419891679 is about 97056.1264372322. The cubic root of 9419891679 is about 2111.9419151284.

The spelling of 9419891679 in words is "nine billion, four hundred nineteen million, eight hundred ninety-one thousand, six hundred seventy-nine".