1545156121440 has 48 divisors (see below), whose sum is σ = 4867241784048. Its totient is φ = 412041632256.

The previous prime is 1545156121387. The next prime is 1545156121463. The reversal of 1545156121440 is 441216515451.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609537147 + ... + 1609538106.

It is an arithmetic number, because the mean of its divisors is an integer number (101400870501).

Almost surely, 2^{1545156121440} is an apocalyptic number.

1545156121440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545156121440 is an abundant number, since it is smaller than the sum of its proper divisors (3322085662608).

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

1545156121440 is a wasteful number, since it uses less digits than its factorization.

1545156121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219075271 (or 3219075263 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 1545156121440 in words is "one trillion, five hundred forty-five billion, one hundred fifty-six million, one hundred twenty-one thousand, four hundred forty".