1535440420325 has 24 divisors (see below), whose sum is σ = 2303934806592. Its totient is φ = 990939697920.

The previous prime is 1535440420321. The next prime is 1535440420399. The reversal of 1535440420325 is 5230240445351.

It is not a de Polignac number, because 1535440420325 - 2² = 1535440420321 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 (1535440420321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258054239 + ... + 258060188.

It is an arithmetic number, because the mean of its divisors is an integer number (95997283608).

Almost surely, 2^{1535440420325} is an apocalyptic number.

It is an amenable number.

1535440420325 is a deficient number, since it is larger than the sum of its proper divisors (768494386267).

1535440420325 is a wasteful number, since it uses less digits than its factorization.

1535440420325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516114461 (or 516114456 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 1535440420325 its reverse (5230240445351), we get a palindrome (6765680865676).

The spelling of 1535440420325 in words is "one trillion, five hundred thirty-five billion, four hundred forty million, four hundred twenty thousand, three hundred twenty-five".