1299279586560 has 144 divisors (see below), whose sum is σ = 4196199712320. Its totient is φ = 342581493760.

The previous prime is 1299279586547. The next prime is 1299279586567. The reversal of 1299279586560 is 656859729921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299279586567) 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, 1559106 + ... + 2242625.

It is an arithmetic number, because the mean of its divisors is an integer number (29140275780).

Almost surely, 2^{1299279586560} is an apocalyptic number.

1299279586560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299279586560 is an abundant number, since it is smaller than the sum of its proper divisors (2896920125760).

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

1299279586560 is an equidigital number, since it uses as much as digits as its factorization.

1299279586560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801844 (or 3801830 counting only the distinct ones).

The product of its (nonzero) digits is 146966400, while the sum is 69.

The spelling of 1299279586560 in words is "one trillion, two hundred ninety-nine billion, two hundred seventy-nine million, five hundred eighty-six thousand, five hundred sixty".