1398636481536 has 1320 divisors, whose sum is σ = 5318366967936. Its totient is φ = 363414159360.

The previous prime is 1398636481513. The next prime is 1398636481547. The reversal of 1398636481536 is 6351846368931.

1398636481536 is a `hidden beast` number, since 1 + 3 + 98 + 6 + 3 + 6 + 4 + 8 + 1 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2141862586 + ... + 2141863238.

Almost surely, 2^{1398636481536} is an apocalyptic number.

1398636481536 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 1398636481536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659183483968).

1398636481536 is an abundant number, since it is smaller than the sum of its proper divisors (3919730486400).

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

1398636481536 is a wasteful number, since it uses less digits than its factorization.

1398636481536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 713 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 1398636481536 in words is "one trillion, three hundred ninety-eight billion, six hundred thirty-six million, four hundred eighty-one thousand, five hundred thirty-six".