1251303555545 has 8 divisors (see below), whose sum is σ = 1566849669696. Its totient is φ = 957519242416.

The previous prime is 1251303555503. The next prime is 1251303555553. The reversal of 1251303555545 is 5455553031521.

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 1251303555545 - 2²² = 1251299361241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251303555496 and 1251303555505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5440450127 + ... + 5440450356.

It is an arithmetic number, because the mean of its divisors is an integer number (195856208712).

Almost surely, 2^{1251303555545} is an apocalyptic number.

It is an amenable number.

1251303555545 is a deficient number, since it is larger than the sum of its proper divisors (315546114151).

1251303555545 is a wasteful number, since it uses less digits than its factorization.

1251303555545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10880900511.

The product of its (nonzero) digits is 1125000, while the sum is 44.

The spelling of 1251303555545 in words is "one trillion, two hundred fifty-one billion, three hundred three million, five hundred fifty-five thousand, five hundred forty-five".