1545145985 has 16 divisors (see below), whose sum is σ = 1889110080. Its totient is φ = 1212905280.

The previous prime is 1545145981. The next prime is 1545145993. The reversal of 1545145985 is 5895415451.

It is not a de Polignac number, because 1545145985 - 2² = 1545145981 is a prime.

It is a super-2 number, since 2×1545145985² = 4774952229923240450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1545145981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163859 + ... + 173031.

It is an arithmetic number, because the mean of its divisors is an integer number (118069380).

Almost surely, 2^1545145985 is an apocalyptic number.

It is an amenable number.

1545145985 is a deficient number, since it is larger than the sum of its proper divisors (343964095).

1545145985 is an equidigital number, since it uses as much as digits as its factorization.

1545145985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808.

The product of its digits is 720000, while the sum is 47.

The square root of 1545145985 is about 39308.3449791517. The cubic root of 1545145985 is about 1156.0851941000.

The spelling of 1545145985 in words is "one billion, five hundred forty-five million, one hundred forty-five thousand, nine hundred eighty-five".