1246144533540 has 96 divisors (see below), whose sum is σ = 3696790648320. Its totient is φ = 312559865856.

The previous prime is 1246144533511. The next prime is 1246144533629. The reversal of 1246144533540 is 453354416421.

It is a junction number, because it is equal to n+sod(n) for n = 1246144533492 and 1246144533501.

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, 1228776 + ... + 2000544.

It is an arithmetic number, because the mean of its divisors is an integer number (38508235920).

Almost surely, 2^{1246144533540} is an apocalyptic number.

1246144533540 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 1246144533540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848395324160).

1246144533540 is an abundant number, since it is smaller than the sum of its proper divisors (2450646114780).

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

1246144533540 is a wasteful number, since it uses less digits than its factorization.

1246144533540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773381 (or 773379 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 1246144533540 its reverse (453354416421), we get a palindrome (1699498949961).

The spelling of 1246144533540 in words is "one trillion, two hundred forty-six billion, one hundred forty-four million, five hundred thirty-three thousand, five hundred forty".