1545115040 has 144 divisors (see below), whose sum is σ = 4496477832. Its totient is φ = 498548736.

The previous prime is 1545115031. The next prime is 1545115043. The reversal of 1545115040 is 405115451.

It can be written as a sum of positive squares in 4 ways, for example, as 1543232656 + 1882384 = 39284^2 + 1372^2 .

It is not an unprimeable number, because it can be changed into a prime (1545115043) 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, 127484 + ... + 139076.

Almost surely, 2^1545115040 is an apocalyptic number.

1545115040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1545115040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2248238916).

1545115040 is an abundant number, since it is smaller than the sum of its proper divisors (2951362792).

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

1545115040 is a wasteful number, since it uses less digits than its factorization.

1545115040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11639 (or 11624 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1545115040 is about 39307.9513584720. The cubic root of 1545115040 is about 1156.0774763190.

The spelling of 1545115040 in words is "one billion, five hundred forty-five million, one hundred fifteen thousand, forty".