19749796677 has 32 divisors (see below), whose sum is σ = 33168060800. Its totient is φ = 11514047616.

The previous prime is 19749796663. The next prime is 19749796681. The reversal of 19749796677 is 77669794791.

19749796677 is a `hidden beast` number, since 1 + 9 + 7 + 497 + 9 + 66 + 77 = 666.

It is not a de Polignac number, because 19749796677 - 2¹⁴ = 19749780293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19749796657) 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 31 ways as a sum of consecutive naturals, for example, 1474048 + ... + 1487385.

It is an arithmetic number, because the mean of its divisors is an integer number (1036501900).

Almost surely, 2^19749796677 is an apocalyptic number.

It is an amenable number.

19749796677 is a deficient number, since it is larger than the sum of its proper divisors (13418264123).

19749796677 is a wasteful number, since it uses less digits than its factorization.

19749796677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961474 (or 2961468 counting only the distinct ones).

The product of its digits is 252047376, while the sum is 72.

The spelling of 19749796677 in words is "nineteen billion, seven hundred forty-nine million, seven hundred ninety-six thousand, six hundred seventy-seven".