19761264783 has 24 divisors (see below), whose sum is σ = 31172712480. Its totient is φ = 11989494720.

The previous prime is 19761264701. The next prime is 19761264793. The reversal of 19761264783 is 38746216791.

19761264783 is a `hidden beast` number, since 1 + 97 + 61 + 26 + 478 + 3 = 666.

It is not a de Polignac number, because 19761264783 - 2¹⁰ = 19761263759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19761264793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1181128 + ... + 1197741.

It is an arithmetic number, because the mean of its divisors is an integer number (1298863020).

Almost surely, 2^19761264783 is an apocalyptic number.

19761264783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19761264783 is a deficient number, since it is larger than the sum of its proper divisors (11411447697).

19761264783 is a wasteful number, since it uses less digits than its factorization.

19761264783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378959 (or 2378956 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 19761264783 in words is "nineteen billion, seven hundred sixty-one million, two hundred sixty-four thousand, seven hundred eighty-three".