783917863949 has 16 divisors (see below), whose sum is σ = 884787261120. Its totient is φ = 687988882560.

The previous prime is 783917863933. The next prime is 783917863969. The reversal of 783917863949 is 949368719387.

It is a cyclic number.

It is not a de Polignac number, because 783917863949 - 2⁴ = 783917863933 is a prime.

It is a super-2 number, since 2×783917863949² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783917863919) 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, 2358809 + ... + 2670545.

It is an arithmetic number, because the mean of its divisors is an integer number (55299203820).

Almost surely, 2^783917863949 is an apocalyptic number.

It is an amenable number.

783917863949 is a deficient number, since it is larger than the sum of its proper divisors (100869397171).

783917863949 is a wasteful number, since it uses less digits than its factorization.

783917863949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319660.

The product of its digits is 493807104, while the sum is 74.

The spelling of 783917863949 in words is "seven hundred eighty-three billion, nine hundred seventeen million, eight hundred sixty-three thousand, nine hundred forty-nine".