778197302949 has 24 divisors (see below), whose sum is σ = 1140618984736. Its totient is φ = 471584916000.

The previous prime is 778197302947. The next prime is 778197302957. The reversal of 778197302949 is 949203791877.

778197302949 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 778197302949 - 2¹ = 778197302947 is a prime.

It is a super-3 number, since 3×778197302949³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 778197302949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778197302947) 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, 3485802 + ... + 3702324.

Almost surely, 2^778197302949 is an apocalyptic number.

It is an amenable number.

778197302949 is a deficient number, since it is larger than the sum of its proper divisors (362421681787).

778197302949 is a wasteful number, since it uses less digits than its factorization.

778197302949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226449 (or 226438 counting only the distinct ones).

The product of its (nonzero) digits is 48009024, while the sum is 66.

The spelling of 778197302949 in words is "seven hundred seventy-eight billion, one hundred ninety-seven million, three hundred two thousand, nine hundred forty-nine".