1299678091025 has 6 divisors (see below), whose sum is σ = 1611600832902. Its totient is φ = 1039742472800.

The previous prime is 1299678090937. The next prime is 1299678091031. The reversal of 1299678091025 is 5201908769921.

It can be written as a sum of positive squares in 3 ways, for example, as 6627099649 + 1293050991376 = 81407^2 + 1137124^2 .

It is not a de Polignac number, because 1299678091025 - 2⁸ = 1299678090769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25993561796 + ... + 25993561845.

It is an arithmetic number, because the mean of its divisors is an integer number (268600138817).

Almost surely, 2^{1299678091025} is an apocalyptic number.

It is an amenable number.

1299678091025 is a deficient number, since it is larger than the sum of its proper divisors (311922741877).

1299678091025 is an equidigital number, since it uses as much as digits as its factorization.

1299678091025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51987123651 (or 51987123646 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 1299678091025 in words is "one trillion, two hundred ninety-nine billion, six hundred seventy-eight million, ninety-one thousand, twenty-five".