1299471123456 has 616 divisors, whose sum is σ = 4472952103200. Its totient is φ = 373009121280.

The previous prime is 1299471123383. The next prime is 1299471123469. The reversal of 1299471123456 is 6543211749921.

1299471123456 is a `hidden beast` number, since 1 + 2 + 9 + 9 + 471 + 123 + 45 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 156013500 + ... + 156021828.

Almost surely, 2^{1299471123456} is an apocalyptic number.

1299471123456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299471123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2236476051600).

1299471123456 is an abundant number, since it is smaller than the sum of its proper divisors (3173480979744).

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

1299471123456 is an equidigital number, since it uses as much as digits as its factorization.

1299471123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8397 (or 8364 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 1299471123456 in words is "one trillion, two hundred ninety-nine billion, four hundred seventy-one million, one hundred twenty-three thousand, four hundred fifty-six".