1255511421355 has 32 divisors (see below), whose sum is σ = 1555497909504. Its totient is φ = 972299759616.

The previous prime is 1255511421343. The next prime is 1255511421397. The reversal of 1255511421355 is 5531241155521.

It is not a de Polignac number, because 1255511421355 - 2⁹ = 1255511420843 is a prime.

It is a Duffinian number.

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, 38575669 + ... + 38608201.

It is an arithmetic number, because the mean of its divisors is an integer number (48609309672).

Almost surely, 2^{1255511421355} is an apocalyptic number.

1255511421355 is a deficient number, since it is larger than the sum of its proper divisors (299986488149).

1255511421355 is a wasteful number, since it uses less digits than its factorization.

1255511421355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34375.

The product of its digits is 150000, while the sum is 40.

Adding to 1255511421355 its reverse (5531241155521), we get a palindrome (6786752576876).

The spelling of 1255511421355 in words is "one trillion, two hundred fifty-five billion, five hundred eleven million, four hundred twenty-one thousand, three hundred fifty-five".