145231561004 has 12 divisors (see below), whose sum is σ = 254217906264. Its totient is φ = 72597873504.

The previous prime is 145231560997. The next prime is 145231561091. The reversal of 145231561004 is 400165132541.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4458494 + ... + 4490949.

It is an arithmetic number, because the mean of its divisors is an integer number (21184825522).

Almost surely, 2^145231561004 is an apocalyptic number.

It is an amenable number.

145231561004 is a deficient number, since it is larger than the sum of its proper divisors (108986345260).

145231561004 is a wasteful number, since it uses less digits than its factorization.

145231561004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8953504 (or 8953502 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 145231561004 its reverse (400165132541), we get a palindrome (545396693545).

The spelling of 145231561004 in words is "one hundred forty-five billion, two hundred thirty-one million, five hundred sixty-one thousand, four".