1531320665460 has 48 divisors (see below), whose sum is σ = 4316093238912. Its totient is φ = 405647856000.

The previous prime is 1531320665431. The next prime is 1531320665473. The reversal of 1531320665460 is 645660231351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84500911 + ... + 84519030.

It is an arithmetic number, because the mean of its divisors is an integer number (89918609144).

Almost surely, 2^{1531320665460} is an apocalyptic number.

1531320665460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1531320665460 is an abundant number, since it is smaller than the sum of its proper divisors (2784772573452).

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

1531320665460 is a wasteful number, since it uses less digits than its factorization.

1531320665460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169020104 (or 169020102 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 1531320665460 in words is "one trillion, five hundred thirty-one billion, three hundred twenty million, six hundred sixty-five thousand, four hundred sixty".