1251353442540 has 96 divisors (see below), whose sum is σ = 3554300445696. Its totient is φ = 328890170880.

The previous prime is 1251353442523. The next prime is 1251353442607. The reversal of 1251353442540 is 452443531521.

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, 6132355 + ... + 6333125.

It is an arithmetic number, because the mean of its divisors is an integer number (37023962976).

Almost surely, 2^{1251353442540} is an apocalyptic number.

1251353442540 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 1251353442540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777150222848).

1251353442540 is an abundant number, since it is smaller than the sum of its proper divisors (2302947003156).

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

1251353442540 is a wasteful number, since it uses less digits than its factorization.

1251353442540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202279 (or 202277 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 1251353442540 in words is "one trillion, two hundred fifty-one billion, three hundred fifty-three million, four hundred forty-two thousand, five hundred forty".