1512145440 has 144 divisors (see below), whose sum is σ = 5557203288. Its totient is φ = 372215808.

The previous prime is 1512145403. The next prime is 1512145471. The reversal of 1512145440 is 445412151.

1512145440 is a `hidden beast` number, since 1 + 5 + 1 + 214 + 5 + 440 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1375816464 + 136328976 = 37092^2 + 11676^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21669 + ... + 59108.

Almost surely, 2^1512145440 is an apocalyptic number.

1512145440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1512145440 is an abundant number, since it is smaller than the sum of its proper divisors (4045057848).

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

1512145440 is a wasteful number, since it uses less digits than its factorization.

1512145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80811 (or 80800 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1512145440 is about 38886.3143020781. The cubic root of 1512145440 is about 1147.7955096358.

Adding to 1512145440 its reverse (445412151), we get a palindrome (1957557591).

The spelling of 1512145440 in words is "one billion, five hundred twelve million, one hundred forty-five thousand, four hundred forty".