1299995566628 has 48 divisors (see below), whose sum is σ = 2587605350400. Its totient is φ = 566038529280.

The previous prime is 1299995566621. The next prime is 1299995566651. The reversal of 1299995566628 is 8266655999921.

It is not an unprimeable number, because it can be changed into a prime (1299995566621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3848993 + ... + 4173096.

It is an arithmetic number, because the mean of its divisors is an integer number (53908444800).

Almost surely, 2^{1299995566628} is an apocalyptic number.

It is an amenable number.

1299995566628 is a deficient number, since it is larger than the sum of its proper divisors (1287609783772).

1299995566628 is a wasteful number, since it uses less digits than its factorization.

1299995566628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022260 (or 8022258 counting only the distinct ones).

The product of its digits is 1133740800, while the sum is 77.

The spelling of 1299995566628 in words is "one trillion, two hundred ninety-nine billion, nine hundred ninety-five million, five hundred sixty-six thousand, six hundred twenty-eight".