1299261998070 has 72 divisors (see below), whose sum is σ = 3531340206576. Its totient is φ = 331405946784.

The previous prime is 1299261998009. The next prime is 1299261998077. The reversal of 1299261998070 is 708991629921.

1299261998070 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 2 + 619 + 9 + 8 + 0 + 7 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1299261997989 and 1299261998007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299261998077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13597234 + ... + 13692453.

It is an arithmetic number, because the mean of its divisors is an integer number (49046391758).

Almost surely, 2^{1299261998070} is an apocalyptic number.

1299261998070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1299261998070 is an abundant number, since it is smaller than the sum of its proper divisors (2232078208506).

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

1299261998070 is a wasteful number, since it uses less digits than its factorization.

1299261998070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27289746 (or 27289720 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 63.

The spelling of 1299261998070 in words is "one trillion, two hundred ninety-nine billion, two hundred sixty-one million, nine hundred ninety-eight thousand, seventy".