1531345146440 has 16 divisors (see below), whose sum is σ = 3445526579580. Its totient is φ = 612538058560.

The previous prime is 1531345146439. The next prime is 1531345146467. The reversal of 1531345146440 is 446415431351.

It can be written as a sum of positive squares in 2 ways, for example, as 1442098363876 + 89246782564 = 1200874^2 + 298742^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19141814291 + ... + 19141814370.

Almost surely, 2^{1531345146440} is an apocalyptic number.

1531345146440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531345146440 is an abundant number, since it is smaller than the sum of its proper divisors (1914181433140).

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

1531345146440 is a wasteful number, since it uses less digits than its factorization.

1531345146440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38283628672 (or 38283628668 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 1531345146440 in words is "one trillion, five hundred thirty-one billion, three hundred forty-five million, one hundred forty-six thousand, four hundred forty".