82761299649 has 12 divisors (see below), whose sum is σ = 136621828096. Its totient is φ = 47292171192.

The previous prime is 82761299617. The next prime is 82761299653. The reversal of 82761299649 is 94699216728.

82761299649 is a `hidden beast` number, since 8 + 2 + 7 + 612 + 9 + 9 + 6 + 4 + 9 = 666.

It is not a de Polignac number, because 82761299649 - 2⁵ = 82761299617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 1313671423 = 82761299649 / (8 + 2 + 7 + 6 + 1 + 2 + 9 + 9 + 6 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82761289649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 656835649 + ... + 656835774.

Almost surely, 2^82761299649 is an apocalyptic number.

It is an amenable number.

82761299649 is a deficient number, since it is larger than the sum of its proper divisors (53860528447).

82761299649 is a wasteful number, since it uses less digits than its factorization.

82761299649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313671436 (or 1313671433 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 82761299649 in words is "eighty-two billion, seven hundred sixty-one million, two hundred ninety-nine thousand, six hundred forty-nine".