767992780449 has 6 divisors (see below), whose sum is σ = 1109322905106. Its totient is φ = 511995186960.

The previous prime is 767992780427. The next prime is 767992780501. The reversal of 767992780449 is 944087299767.

767992780449 is a `hidden beast` number, since 76 + 7 + 99 + 27 + 8 + 0 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 758336180625 + 9656599824 = 870825^2 + 98268^2 .

It is not a de Polignac number, because 767992780449 - 2¹⁵ = 767992747681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (767992780349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42666265572 + ... + 42666265589.

It is an arithmetic number, because the mean of its divisors is an integer number (184887150851).

Almost surely, 2^767992780449 is an apocalyptic number.

It is an amenable number.

767992780449 is a deficient number, since it is larger than the sum of its proper divisors (341330124657).

767992780449 is a wasteful number, since it uses less digits than its factorization.

767992780449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85332531167 (or 85332531164 counting only the distinct ones).

The product of its (nonzero) digits is 384072192, while the sum is 72.

The spelling of 767992780449 in words is "seven hundred sixty-seven billion, nine hundred ninety-two million, seven hundred eighty thousand, four hundred forty-nine".