83078646742521 has 12 divisors (see below), whose sum is σ = 120023240720448. Its totient is φ = 55376187119064.

The previous prime is 83078646742459. The next prime is 83078646742631. The reversal of 83078646742521 is 12524764687038.

83078646742521 is a `hidden beast` number, since 8 + 3 + 0 + 7 + 8 + 6 + 4 + 67 + 42 + 521 = 666.

It is not a de Polignac number, because 83078646742521 - 2⁹ = 83078646742009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83078646742921) 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, 798059725 + ... + 798163818.

It is an arithmetic number, because the mean of its divisors is an integer number (10001936726704).

Almost surely, 2^{83078646742521} is an apocalyptic number.

It is an amenable number.

83078646742521 is a deficient number, since it is larger than the sum of its proper divisors (36944593977927).

83078646742521 is a wasteful number, since it uses less digits than its factorization.

83078646742521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596229332 (or 1596229329 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 63.

The spelling of 83078646742521 in words is "eighty-three trillion, seventy-eight billion, six hundred forty-six million, seven hundred forty-two thousand, five hundred twenty-one".