1299678091026 has 48 divisors (see below), whose sum is σ = 3182885134560. Its totient is φ = 351792564480.

The previous prime is 1299678090937. The next prime is 1299678091031. The reversal of 1299678091026 is 6201908769921.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116327935 + ... + 116339106.

It is an arithmetic number, because the mean of its divisors is an integer number (66310106970).

Almost surely, 2^{1299678091026} is an apocalyptic number.

1299678091026 is an abundant number, since it is smaller than the sum of its proper divisors (1883207043534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299678091026 is a wasteful number, since it uses less digits than its factorization.

1299678091026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232667079 (or 232667072 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 60.

The spelling of 1299678091026 in words is "one trillion, two hundred ninety-nine billion, six hundred seventy-eight million, ninety-one thousand, twenty-six".