1545640004 has 12 divisors (see below), whose sum is σ = 2716095228. Its totient is φ = 769612800.

The previous prime is 1545640003. The next prime is 1545640009. The reversal of 1545640004 is 4000465451.

It can be written as a sum of positive squares in 2 ways, for example, as 1406400004 + 139240000 = 37502^2 + 11800^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1545640003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800717 + ... + 802644.

It is an arithmetic number, because the mean of its divisors is an integer number (226341269).

Almost surely, 2^1545640004 is an apocalyptic number.

It is an amenable number.

1545640004 is a deficient number, since it is larger than the sum of its proper divisors (1170455224).

1545640004 is a wasteful number, since it uses less digits than its factorization.

1545640004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603606 (or 1603604 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1545640004 is about 39314.6283716380. The cubic root of 1545640004 is about 1156.2083900526.

The spelling of 1545640004 in words is "one billion, five hundred forty-five million, six hundred forty thousand, four".