1229635399680 has 416 divisors, whose sum is σ = 4382997547200. Its totient is φ = 327040892928.

The previous prime is 1229635399667. The next prime is 1229635399721. The reversal of 1229635399680 is 869935369221.

1229635399680 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 6 + 3 + 539 + 96 + 8 + 0 = 666.

It is a super-2 number, since 2×1229635399680² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226157922 + ... + 226163358.

Almost surely, 2^{1229635399680} is an apocalyptic number.

1229635399680 is a gapful number since it is divisible by the number (10) 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 1229635399680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2191498773600).

1229635399680 is an abundant number, since it is smaller than the sum of its proper divisors (3153362147520).

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

1229635399680 is an equidigital number, since it uses as much as digits as its factorization.

1229635399680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5884 (or 5856 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 1229635399680 in words is "one trillion, two hundred twenty-nine billion, six hundred thirty-five million, three hundred ninety-nine thousand, six hundred eighty".