1251504545453 has 8 divisors (see below), whose sum is σ = 1348009792800. Its totient is φ = 1158062956848.

The previous prime is 1251504545449. The next prime is 1251504545471. The reversal of 1251504545453 is 3545454051521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251504545453 - 2² = 1251504545449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251504545153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765913838 + ... + 765915471.

It is an arithmetic number, because the mean of its divisors is an integer number (168501224100).

Almost surely, 2^{1251504545453} is an apocalyptic number.

It is an amenable number.

1251504545453 is a deficient number, since it is larger than the sum of its proper divisors (96505247347).

1251504545453 is a wasteful number, since it uses less digits than its factorization.

1251504545453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531829371.

The product of its (nonzero) digits is 1200000, while the sum is 44.

Adding to 1251504545453 its reverse (3545454051521), we get a palindrome (4796958596974).

The spelling of 1251504545453 in words is "one trillion, two hundred fifty-one billion, five hundred four million, five hundred forty-five thousand, four hundred fifty-three".